code: public static MongoCredential createScramSha1Credential(final String userName, final String source, final char[] password) {
          return new MongoCredential(SCRAM_SHA_1, userName, source, password);
      }
docs: Creates a MongoCredential instance for the SCRAM-SHA-1 SASL mechanism. Use this method only if you want to ensure that
  the driver uses the SCRAM-SHA-1 mechanism regardless of whether the server you are connecting to supports the
  authentication mechanism.  Otherwise use the {@link #createCredential(String, String, char[])} method to allow the driver to
  negotiate the best mechanism based on the server version.
  
  
  @param userName the non-null user name
  @param source the source where the user is defined.
  @param password the non-null user password
  @return the credential
  @see #createCredential(String, String, char[])
  
  @since 2.13
  @mongodb.server.release 3.0
  @mongodb.driver.manual core/authentication/#authentication-scram-sha-1 SCRAM-SHA-1