diff --git a/api/v3/api_proto/users_pb2.py b/api/v3/api_proto/users_pb2.py
new file mode 100644
index 0000000..f08b494
--- /dev/null
+++ b/api/v3/api_proto/users_pb2.py
@@ -0,0 +1,472 @@
+# -*- coding: utf-8 -*-
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: api/v3/api_proto/users.proto
+
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from google.api import field_behavior_pb2 as google_dot_api_dot_field__behavior__pb2
+from google.api import resource_pb2 as google_dot_api_dot_resource__pb2
+from api.v3.api_proto import user_objects_pb2 as api_dot_v3_dot_api__proto_dot_user__objects__pb2
+from google.protobuf import empty_pb2 as google_dot_protobuf_dot_empty__pb2
+from google.protobuf import field_mask_pb2 as google_dot_protobuf_dot_field__mask__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='api/v3/api_proto/users.proto',
+  package='monorail.v3',
+  syntax='proto3',
+  serialized_options=b'Z\020api/v3/api_proto',
+  create_key=_descriptor._internal_create_key,
+  serialized_pb=b'\n\x1c\x61pi/v3/api_proto/users.proto\x12\x0bmonorail.v3\x1a\x1fgoogle/api/field_behavior.proto\x1a\x19google/api/resource.proto\x1a#api/v3/api_proto/user_objects.proto\x1a\x1bgoogle/protobuf/empty.proto\x1a google/protobuf/field_mask.proto\":\n\x0eGetUserRequest\x12(\n\x04name\x18\x01 \x01(\tB\x1a\xfa\x41\x14\n\x12\x61pi.crbug.com/User\xe0\x41\x02\"A\n\x14\x42\x61tchGetUsersRequest\x12)\n\x05names\x18\x01 \x03(\tB\x1a\xfa\x41\x14\n\x12\x61pi.crbug.com/User\xe0\x41\x02\"9\n\x15\x42\x61tchGetUsersResponse\x12 \n\x05users\x18\x01 \x03(\x0b\x32\x11.monorail.v3.User\"\x86\x01\n\x11UpdateUserRequest\x12;\n\x04user\x18\x01 \x01(\x0b\x32\x11.monorail.v3.UserB\x1a\xe0\x41\x02\xfa\x41\x14\n\x12\x61pi.crbug.com/User\x12\x34\n\x0bupdate_mask\x18\x02 \x01(\x0b\x32\x1a.google.protobuf.FieldMaskB\x03\xe0\x41\x02\"D\n\x12StarProjectRequest\x12.\n\x07project\x18\x01 \x01(\tB\x1d\xfa\x41\x17\n\x15\x61pi.crbug.com/Project\xe0\x41\x02\"F\n\x14UnStarProjectRequest\x12.\n\x07project\x18\x01 \x01(\tB\x1d\xfa\x41\x17\n\x15\x61pi.crbug.com/Project\xe0\x41\x02\"l\n\x17ListProjectStarsRequest\x12*\n\x06parent\x18\x01 \x01(\tB\x1a\xfa\x41\x14\n\x12\x61pi.crbug.com/User\xe0\x41\x02\x12\x11\n\tpage_size\x18\x02 \x01(\x05\x12\x12\n\npage_token\x18\x03 \x01(\t\"d\n\x18ListProjectStarsResponse\x12/\n\rproject_stars\x18\x01 \x03(\x0b\x32\x18.monorail.v3.ProjectStar\x12\x17\n\x0fnext_page_token\x18\x02 \x01(\t2\xde\x03\n\x05Users\x12;\n\x07GetUser\x12\x1b.monorail.v3.GetUserRequest\x1a\x11.monorail.v3.User\"\x00\x12X\n\rBatchGetUsers\x12!.monorail.v3.BatchGetUsersRequest\x1a\".monorail.v3.BatchGetUsersResponse\"\x00\x12\x41\n\nUpdateUser\x12\x1e.monorail.v3.UpdateUserRequest\x1a\x11.monorail.v3.User\"\x00\x12J\n\x0bStarProject\x12\x1f.monorail.v3.StarProjectRequest\x1a\x18.monorail.v3.ProjectStar\"\x00\x12L\n\rUnStarProject\x12!.monorail.v3.UnStarProjectRequest\x1a\x16.google.protobuf.Empty\"\x00\x12\x61\n\x10ListProjectStars\x12$.monorail.v3.ListProjectStarsRequest\x1a%.monorail.v3.ListProjectStarsResponse\"\x00\x42\x12Z\x10\x61pi/v3/api_protob\x06proto3'
+  ,
+  dependencies=[google_dot_api_dot_field__behavior__pb2.DESCRIPTOR,google_dot_api_dot_resource__pb2.DESCRIPTOR,api_dot_v3_dot_api__proto_dot_user__objects__pb2.DESCRIPTOR,google_dot_protobuf_dot_empty__pb2.DESCRIPTOR,google_dot_protobuf_dot_field__mask__pb2.DESCRIPTOR,])
+
+
+
+
+_GETUSERREQUEST = _descriptor.Descriptor(
+  name='GetUserRequest',
+  full_name='monorail.v3.GetUserRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='name', full_name='monorail.v3.GetUserRequest.name', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\372A\024\n\022api.crbug.com/User\340A\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=205,
+  serialized_end=263,
+)
+
+
+_BATCHGETUSERSREQUEST = _descriptor.Descriptor(
+  name='BatchGetUsersRequest',
+  full_name='monorail.v3.BatchGetUsersRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='names', full_name='monorail.v3.BatchGetUsersRequest.names', index=0,
+      number=1, type=9, cpp_type=9, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\372A\024\n\022api.crbug.com/User\340A\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=265,
+  serialized_end=330,
+)
+
+
+_BATCHGETUSERSRESPONSE = _descriptor.Descriptor(
+  name='BatchGetUsersResponse',
+  full_name='monorail.v3.BatchGetUsersResponse',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='users', full_name='monorail.v3.BatchGetUsersResponse.users', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=332,
+  serialized_end=389,
+)
+
+
+_UPDATEUSERREQUEST = _descriptor.Descriptor(
+  name='UpdateUserRequest',
+  full_name='monorail.v3.UpdateUserRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='user', full_name='monorail.v3.UpdateUserRequest.user', index=0,
+      number=1, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\340A\002\372A\024\n\022api.crbug.com/User', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='update_mask', full_name='monorail.v3.UpdateUserRequest.update_mask', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\340A\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=392,
+  serialized_end=526,
+)
+
+
+_STARPROJECTREQUEST = _descriptor.Descriptor(
+  name='StarProjectRequest',
+  full_name='monorail.v3.StarProjectRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='project', full_name='monorail.v3.StarProjectRequest.project', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\372A\027\n\025api.crbug.com/Project\340A\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=528,
+  serialized_end=596,
+)
+
+
+_UNSTARPROJECTREQUEST = _descriptor.Descriptor(
+  name='UnStarProjectRequest',
+  full_name='monorail.v3.UnStarProjectRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='project', full_name='monorail.v3.UnStarProjectRequest.project', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\372A\027\n\025api.crbug.com/Project\340A\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=598,
+  serialized_end=668,
+)
+
+
+_LISTPROJECTSTARSREQUEST = _descriptor.Descriptor(
+  name='ListProjectStarsRequest',
+  full_name='monorail.v3.ListProjectStarsRequest',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='parent', full_name='monorail.v3.ListProjectStarsRequest.parent', index=0,
+      number=1, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=b'\372A\024\n\022api.crbug.com/User\340A\002', file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='page_size', full_name='monorail.v3.ListProjectStarsRequest.page_size', index=1,
+      number=2, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='page_token', full_name='monorail.v3.ListProjectStarsRequest.page_token', index=2,
+      number=3, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=670,
+  serialized_end=778,
+)
+
+
+_LISTPROJECTSTARSRESPONSE = _descriptor.Descriptor(
+  name='ListProjectStarsResponse',
+  full_name='monorail.v3.ListProjectStarsResponse',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='project_stars', full_name='monorail.v3.ListProjectStarsResponse.project_stars', index=0,
+      number=1, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='next_page_token', full_name='monorail.v3.ListProjectStarsResponse.next_page_token', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=780,
+  serialized_end=880,
+)
+
+_BATCHGETUSERSRESPONSE.fields_by_name['users'].message_type = api_dot_v3_dot_api__proto_dot_user__objects__pb2._USER
+_UPDATEUSERREQUEST.fields_by_name['user'].message_type = api_dot_v3_dot_api__proto_dot_user__objects__pb2._USER
+_UPDATEUSERREQUEST.fields_by_name['update_mask'].message_type = google_dot_protobuf_dot_field__mask__pb2._FIELDMASK
+_LISTPROJECTSTARSRESPONSE.fields_by_name['project_stars'].message_type = api_dot_v3_dot_api__proto_dot_user__objects__pb2._PROJECTSTAR
+DESCRIPTOR.message_types_by_name['GetUserRequest'] = _GETUSERREQUEST
+DESCRIPTOR.message_types_by_name['BatchGetUsersRequest'] = _BATCHGETUSERSREQUEST
+DESCRIPTOR.message_types_by_name['BatchGetUsersResponse'] = _BATCHGETUSERSRESPONSE
+DESCRIPTOR.message_types_by_name['UpdateUserRequest'] = _UPDATEUSERREQUEST
+DESCRIPTOR.message_types_by_name['StarProjectRequest'] = _STARPROJECTREQUEST
+DESCRIPTOR.message_types_by_name['UnStarProjectRequest'] = _UNSTARPROJECTREQUEST
+DESCRIPTOR.message_types_by_name['ListProjectStarsRequest'] = _LISTPROJECTSTARSREQUEST
+DESCRIPTOR.message_types_by_name['ListProjectStarsResponse'] = _LISTPROJECTSTARSRESPONSE
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+GetUserRequest = _reflection.GeneratedProtocolMessageType('GetUserRequest', (_message.Message,), {
+  'DESCRIPTOR' : _GETUSERREQUEST,
+  '__module__' : 'api.v3.api_proto.users_pb2'
+  # @@protoc_insertion_point(class_scope:monorail.v3.GetUserRequest)
+  })
+_sym_db.RegisterMessage(GetUserRequest)
+
+BatchGetUsersRequest = _reflection.GeneratedProtocolMessageType('BatchGetUsersRequest', (_message.Message,), {
+  'DESCRIPTOR' : _BATCHGETUSERSREQUEST,
+  '__module__' : 'api.v3.api_proto.users_pb2'
+  # @@protoc_insertion_point(class_scope:monorail.v3.BatchGetUsersRequest)
+  })
+_sym_db.RegisterMessage(BatchGetUsersRequest)
+
+BatchGetUsersResponse = _reflection.GeneratedProtocolMessageType('BatchGetUsersResponse', (_message.Message,), {
+  'DESCRIPTOR' : _BATCHGETUSERSRESPONSE,
+  '__module__' : 'api.v3.api_proto.users_pb2'
+  # @@protoc_insertion_point(class_scope:monorail.v3.BatchGetUsersResponse)
+  })
+_sym_db.RegisterMessage(BatchGetUsersResponse)
+
+UpdateUserRequest = _reflection.GeneratedProtocolMessageType('UpdateUserRequest', (_message.Message,), {
+  'DESCRIPTOR' : _UPDATEUSERREQUEST,
+  '__module__' : 'api.v3.api_proto.users_pb2'
+  # @@protoc_insertion_point(class_scope:monorail.v3.UpdateUserRequest)
+  })
+_sym_db.RegisterMessage(UpdateUserRequest)
+
+StarProjectRequest = _reflection.GeneratedProtocolMessageType('StarProjectRequest', (_message.Message,), {
+  'DESCRIPTOR' : _STARPROJECTREQUEST,
+  '__module__' : 'api.v3.api_proto.users_pb2'
+  # @@protoc_insertion_point(class_scope:monorail.v3.StarProjectRequest)
+  })
+_sym_db.RegisterMessage(StarProjectRequest)
+
+UnStarProjectRequest = _reflection.GeneratedProtocolMessageType('UnStarProjectRequest', (_message.Message,), {
+  'DESCRIPTOR' : _UNSTARPROJECTREQUEST,
+  '__module__' : 'api.v3.api_proto.users_pb2'
+  # @@protoc_insertion_point(class_scope:monorail.v3.UnStarProjectRequest)
+  })
+_sym_db.RegisterMessage(UnStarProjectRequest)
+
+ListProjectStarsRequest = _reflection.GeneratedProtocolMessageType('ListProjectStarsRequest', (_message.Message,), {
+  'DESCRIPTOR' : _LISTPROJECTSTARSREQUEST,
+  '__module__' : 'api.v3.api_proto.users_pb2'
+  # @@protoc_insertion_point(class_scope:monorail.v3.ListProjectStarsRequest)
+  })
+_sym_db.RegisterMessage(ListProjectStarsRequest)
+
+ListProjectStarsResponse = _reflection.GeneratedProtocolMessageType('ListProjectStarsResponse', (_message.Message,), {
+  'DESCRIPTOR' : _LISTPROJECTSTARSRESPONSE,
+  '__module__' : 'api.v3.api_proto.users_pb2'
+  # @@protoc_insertion_point(class_scope:monorail.v3.ListProjectStarsResponse)
+  })
+_sym_db.RegisterMessage(ListProjectStarsResponse)
+
+
+DESCRIPTOR._options = None
+_GETUSERREQUEST.fields_by_name['name']._options = None
+_BATCHGETUSERSREQUEST.fields_by_name['names']._options = None
+_UPDATEUSERREQUEST.fields_by_name['user']._options = None
+_UPDATEUSERREQUEST.fields_by_name['update_mask']._options = None
+_STARPROJECTREQUEST.fields_by_name['project']._options = None
+_UNSTARPROJECTREQUEST.fields_by_name['project']._options = None
+_LISTPROJECTSTARSREQUEST.fields_by_name['parent']._options = None
+
+_USERS = _descriptor.ServiceDescriptor(
+  name='Users',
+  full_name='monorail.v3.Users',
+  file=DESCRIPTOR,
+  index=0,
+  serialized_options=None,
+  create_key=_descriptor._internal_create_key,
+  serialized_start=883,
+  serialized_end=1361,
+  methods=[
+  _descriptor.MethodDescriptor(
+    name='GetUser',
+    full_name='monorail.v3.Users.GetUser',
+    index=0,
+    containing_service=None,
+    input_type=_GETUSERREQUEST,
+    output_type=api_dot_v3_dot_api__proto_dot_user__objects__pb2._USER,
+    serialized_options=None,
+    create_key=_descriptor._internal_create_key,
+  ),
+  _descriptor.MethodDescriptor(
+    name='BatchGetUsers',
+    full_name='monorail.v3.Users.BatchGetUsers',
+    index=1,
+    containing_service=None,
+    input_type=_BATCHGETUSERSREQUEST,
+    output_type=_BATCHGETUSERSRESPONSE,
+    serialized_options=None,
+    create_key=_descriptor._internal_create_key,
+  ),
+  _descriptor.MethodDescriptor(
+    name='UpdateUser',
+    full_name='monorail.v3.Users.UpdateUser',
+    index=2,
+    containing_service=None,
+    input_type=_UPDATEUSERREQUEST,
+    output_type=api_dot_v3_dot_api__proto_dot_user__objects__pb2._USER,
+    serialized_options=None,
+    create_key=_descriptor._internal_create_key,
+  ),
+  _descriptor.MethodDescriptor(
+    name='StarProject',
+    full_name='monorail.v3.Users.StarProject',
+    index=3,
+    containing_service=None,
+    input_type=_STARPROJECTREQUEST,
+    output_type=api_dot_v3_dot_api__proto_dot_user__objects__pb2._PROJECTSTAR,
+    serialized_options=None,
+    create_key=_descriptor._internal_create_key,
+  ),
+  _descriptor.MethodDescriptor(
+    name='UnStarProject',
+    full_name='monorail.v3.Users.UnStarProject',
+    index=4,
+    containing_service=None,
+    input_type=_UNSTARPROJECTREQUEST,
+    output_type=google_dot_protobuf_dot_empty__pb2._EMPTY,
+    serialized_options=None,
+    create_key=_descriptor._internal_create_key,
+  ),
+  _descriptor.MethodDescriptor(
+    name='ListProjectStars',
+    full_name='monorail.v3.Users.ListProjectStars',
+    index=5,
+    containing_service=None,
+    input_type=_LISTPROJECTSTARSREQUEST,
+    output_type=_LISTPROJECTSTARSRESPONSE,
+    serialized_options=None,
+    create_key=_descriptor._internal_create_key,
+  ),
+])
+_sym_db.RegisterServiceDescriptor(_USERS)
+
+DESCRIPTOR.services_by_name['Users'] = _USERS
+
+# @@protoc_insertion_point(module_scope)