add first task and generate authentication service

.vscode/tasks.json

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+{
+  // See https://go.microsoft.com/fwlink/?LinkId=733558
+  // for the documentation about the tasks.json format
+  "version": "2.0.0",
+  "tasks": [
+    {
+      "label": "generate code from protos",
+      "type": "shell",
+      "command": "protoc",
+      "args": [
+        "--dart_out=grpc:common/generated_io/lib/src",
+        "-Iprotos",
+        "-Ithird_party/protobuf/src",
+        "-Ithird_party/googleapis",
+        "google/protobuf/empty.proto",
+        "services/authentication_service.proto"
+      ],
+    }
+  ]
+}

common/generated_io/.gitignore

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+# Files and directories created by pub
+.dart_tool/
+.packages
+# Remove the following pattern if you wish to check in your lock file
+pubspec.lock
+
+# Conventional directory for build outputs
+build/
+
+# Directory created by dartdoc
+doc/api/

common/generated_io/analysis_options.yaml

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+# Defines a default set of lint rules enforced for
+# projects at Google. For details and rationale,
+# see https://github.com/dart-lang/pedantic#enabled-lints.
+include: package:pedantic/analysis_options.yaml
+
+# For lint rules and documentation, see http://dart-lang.github.io/linter/lints.
+# Uncomment to specify additional rules.
+# linter:
+#   rules:
+#     - camel_case_types
+
+analyzer:
+#   exclude:
+#     - path/to/excluded/files/**

common/generated_io/lib/generated_io.dart

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+//  from third party
+export 'package:generated_io/src/google/protobuf/empty.pb.dart';
+export 'package:generated_io/src/google/protobuf/empty.pbenum.dart';
+export 'package:generated_io/src/google/protobuf/empty.pbjson.dart';
+
+//  authentication service
+export 'package:generated_io/src/services/authentication_service.pb.dart';
+export 'package:generated_io/src/services/authentication_service.pbenum.dart';
+export 'package:generated_io/src/services/authentication_service.pbgrpc.dart';
+export 'package:generated_io/src/services/authentication_service.pbjson.dart';

common/generated_io/lib/src/google/protobuf/empty.pb.dart

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+///
+//  Generated code. Do not modify.
+//  source: google/protobuf/empty.proto
+///
+// ignore_for_file: non_constant_identifier_names,library_prefixes,unused_import
+
+// ignore: UNUSED_SHOWN_NAME
+import 'dart:core' show int, bool, double, String, List, Map, override;
+
+import 'package:protobuf/protobuf.dart' as $pb;
+
+class Empty extends $pb.GeneratedMessage {
+  static final $pb.BuilderInfo _i = new $pb.BuilderInfo('Empty', package: const $pb.PackageName('google.protobuf'))
+    ..hasRequiredFields = false
+  ;
+
+  Empty() : super();
+  Empty.fromBuffer(List<int> i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) : super.fromBuffer(i, r);
+  Empty.fromJson(String i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) : super.fromJson(i, r);
+  Empty clone() => new Empty()..mergeFromMessage(this);
+  Empty copyWith(void Function(Empty) updates) => super.copyWith((message) => updates(message as Empty));
+  $pb.BuilderInfo get info_ => _i;
+  static Empty create() => new Empty();
+  Empty createEmptyInstance() => create();
+  static $pb.PbList<Empty> createRepeated() => new $pb.PbList<Empty>();
+  static Empty getDefault() => _defaultInstance ??= create()..freeze();
+  static Empty _defaultInstance;
+  static void $checkItem(Empty v) {
+    if (v is! Empty) $pb.checkItemFailed(v, _i.qualifiedMessageName);
+  }
+}
+

common/generated_io/lib/src/google/protobuf/empty.pbenum.dart

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+///
+//  Generated code. Do not modify.
+//  source: google/protobuf/empty.proto
+///
+// ignore_for_file: non_constant_identifier_names,library_prefixes,unused_import
+

common/generated_io/lib/src/google/protobuf/empty.pbjson.dart

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+///
+//  Generated code. Do not modify.
+//  source: google/protobuf/empty.proto
+///
+// ignore_for_file: non_constant_identifier_names,library_prefixes,unused_import
+
+const Empty$json = const {
+  '1': 'Empty',
+};
+

common/generated_io/lib/src/services/authentication_service.pb.dart

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+///
+//  Generated code. Do not modify.
+//  source: services/authentication_service.proto
+///
+// ignore_for_file: non_constant_identifier_names,library_prefixes,unused_import
+
+// ignore: UNUSED_SHOWN_NAME
+import 'dart:core' show int, bool, double, String, List, Map, override;
+
+import 'package:protobuf/protobuf.dart' as $pb;
+
+class SigninRequest extends $pb.GeneratedMessage {
+  static final $pb.BuilderInfo _i = new $pb.BuilderInfo('SigninRequest', package: const $pb.PackageName('stashall'))
+    ..aOS(1, 'email')
+    ..aOS(2, 'password')
+    ..hasRequiredFields = false
+  ;
+
+  SigninRequest() : super();
+  SigninRequest.fromBuffer(List<int> i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) : super.fromBuffer(i, r);
+  SigninRequest.fromJson(String i, [$pb.ExtensionRegistry r = $pb.ExtensionRegistry.EMPTY]) : super.fromJson(i, r);
+  SigninRequest clone() => new SigninRequest()..mergeFromMessage(this);
+  SigninRequest copyWith(void Function(SigninRequest) updates) => super.copyWith((message) => updates(message as SigninRequest));
+  $pb.BuilderInfo get info_ => _i;
+  static SigninRequest create() => new SigninRequest();
+  SigninRequest createEmptyInstance() => create();
+  static $pb.PbList<SigninRequest> createRepeated() => new $pb.PbList<SigninRequest>();
+  static SigninRequest getDefault() => _defaultInstance ??= create()..freeze();
+  static SigninRequest _defaultInstance;
+  static void $checkItem(SigninRequest v) {
+    if (v is! SigninRequest) $pb.checkItemFailed(v, _i.qualifiedMessageName);
+  }
+
+  String get email => $_getS(0, '');
+  set email(String v) { $_setString(0, v); }
+  bool hasEmail() => $_has(0);
+  void clearEmail() => clearField(1);
+
+  String get password => $_getS(1, '');
+  set password(String v) { $_setString(1, v); }
+  bool hasPassword() => $_has(1);
+  void clearPassword() => clearField(2);
+}
+

common/generated_io/lib/src/services/authentication_service.pbenum.dart

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+///
+//  Generated code. Do not modify.
+//  source: services/authentication_service.proto
+///
+// ignore_for_file: non_constant_identifier_names,library_prefixes,unused_import
+

common/generated_io/lib/src/services/authentication_service.pbgrpc.dart

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+///
+//  Generated code. Do not modify.
+//  source: services/authentication_service.proto
+///
+// ignore_for_file: non_constant_identifier_names,library_prefixes,unused_import
+
+import 'dart:async' as $async;
+
+import 'package:grpc/grpc.dart';
+
+import 'authentication_service.pb.dart';
+import '../google/protobuf/empty.pb.dart' as $0;
+export 'authentication_service.pb.dart';
+
+class AuthenticationServiceClient extends Client {
+  static final _$signin = new ClientMethod<SigninRequest, $0.Empty>(
+      '/stashall.AuthenticationService/signin',
+      (SigninRequest value) => value.writeToBuffer(),
+      (List<int> value) => new $0.Empty.fromBuffer(value));
+
+  AuthenticationServiceClient(ClientChannel channel, {CallOptions options})
+      : super(channel, options: options);
+
+  ResponseFuture<$0.Empty> signin(SigninRequest request,
+      {CallOptions options}) {
+    final call = $createCall(
+        _$signin, new $async.Stream.fromIterable([request]),
+        options: options);
+    return new ResponseFuture(call);
+  }
+}
+
+abstract class AuthenticationServiceBase extends Service {
+  String get $name => 'stashall.AuthenticationService';
+
+  AuthenticationServiceBase() {
+    $addMethod(new ServiceMethod<SigninRequest, $0.Empty>(
+        'signin',
+        signin_Pre,
+        false,
+        false,
+        (List<int> value) => new SigninRequest.fromBuffer(value),
+        ($0.Empty value) => value.writeToBuffer()));
+  }
+
+  $async.Future<$0.Empty> signin_Pre(
+      ServiceCall call, $async.Future request) async {
+    return signin(call, await request);
+  }
+
+  $async.Future<$0.Empty> signin(ServiceCall call, SigninRequest request);
+}

common/generated_io/lib/src/services/authentication_service.pbjson.dart

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+///
+//  Generated code. Do not modify.
+//  source: services/authentication_service.proto
+///
+// ignore_for_file: non_constant_identifier_names,library_prefixes,unused_import
+
+const SigninRequest$json = const {
+  '1': 'SigninRequest',
+  '2': const [
+    const {'1': 'email', '3': 1, '4': 1, '5': 9, '10': 'email'},
+    const {'1': 'password', '3': 2, '4': 1, '5': 9, '10': 'password'},
+  ],
+};
+

common/generated_io/pubspec.yaml

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+name: generated_io
+description: A sample command-line application.
+# version: 1.0.0
+# homepage: https://www.example.com
+# author: kevin <[email protected]>
+
+environment:
+  sdk: '>=2.1.0 <3.0.0'
+
+dependencies:
+  grpc: ^1.0.2
+  protobuf: ^0.13.11
+
+dev_dependencies:
+  pedantic: ^1.0.0
+  test: ^1.0.0