code: public static MySQLManager authenticate(AzureTokenCredentials credentials, String subscriptionId) {
          return new MySQLManager(new RestClient.Builder()
              .withBaseUrl(credentials.environment(), AzureEnvironment.Endpoint.RESOURCE_MANAGER)
              .withCredentials(credentials)
              .withSerializerAdapter(new AzureJacksonAdapter())
              .withResponseBuilderFactory(new AzureResponseBuilder.Factory())
              .build(), subscriptionId);
      }
docs: Creates an instance of MySQLManager that exposes DBforMySQL resource management API entry points.
  
  @param credentials the credentials to use
  @param subscriptionId the subscription UUID
  @return the MySQLManager