| crypto/tls | Package tls partially implements TLS 1.2, as specified in RFC 5246, and TLS 1.3, as specified in RFC 8446. |
| golang.org/x/net/context | Package context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes. |
| golang.org/x/oauth2 | Package oauth2 provides support for making OAuth2 authorized and authenticated HTTP requests, as specified in RFC 6749. |
| google.golang.org/grpc | Package grpc implements an RPC system called gRPC. |
| google.golang.org/grpc/credentials | Package credentials implements various credentials supported by gRPC library, which encapsulate all the state needed by a client to authenticate with a server and make various assertions, e.g., about the client's identity, role, or whether it is authorized to make a particular call. |
| google.golang.org/grpc/credentials/oauth | Package oauth implements gRPC credentials using OAuth. |
| google.golang.org/grpc/examples/helloworld/helloworld | |
| log | Package log implements a simple logging package. |
| time | Package time provides functionality for measuring and displaying time. |