code: public ClassicAuthenticator bucket(String bucketName, String password) {
          this.bucketCredentials.put(bucketName, new Credential(bucketName, password));
          return this;
      }
docs: Sets the {@link CredentialContext#BUCKET_KV} / {@link CredentialContext#BUCKET_N1QL} credential for the
  the *bucketName* specific.
  
  @param bucketName the name of the bucket for which to set a password.
  @param password the password for the bucket.
  @return this {@link ClassicAuthenticator} for chaining.