Error Codes and Types

Error Code	Meaning
`400`	Indicates that the server cannot process the request due to a malformed request.
`401`	Indicates that the request has not been completed due to its lack of valid authentication credentials for the requested resource.
`403`	Indicates that the server understands the request but the provided credentials do not have sufficient authorizations on the given resource.
`404`	Indicates that the requested resource does not exist.
`409`	Indicates a request conflict with the current state of the target resource. This can happen when trying to create a resource that already exists.
`500`	Indicates that the server encountered an unexpected condition that prevented it from fulfilling the request.
`501`	Indicates that the server does not support the functionality required to fulfill the request.

Error Type	Meaning
`ALREADY_EXISTS`	The resource with the provided ID already exists in the system.
`FAILED_PRECONDITION`	The operation was rejected because the system is not in a state required for the operation’s execution.
`INTERNAL`	Internal error.
`INVALID_ARGUMENT`	The caller specified an invalid argument. Note that this differs from FAILED_PRECONDITION. INVALID_ARGUMENT indicates arguments that are problematic regardless of the state of the system (e.g., a malformed file name).
`NOT_FOUND`	The given ID does not correlate to an existing resource in the system.
`OUT_OF_RANGE`	The operation was attempted past the valid range.
`UNIMPLEMENTED`	The operation is not implemented or is not supported/configured in this service.
`PERMISSION_DENIED`	The caller does not have permission to execute the specified operation.
`UNAUTHENTICATED`	The request does not have valid authentication credentials for the operation.