public Builder mergeAzureCredentials(
          com.google.storagetransfer.v1.proto.TransferTypes.AzureCredentials value) {
        if (azureCredentialsBuilder_ == null) {
          if (((bitField0_ & 0x00000002) != 0)
              && azureCredentials_ != null
              && azureCredentials_
                  != com.google.storagetransfer.v1.proto.TransferTypes.AzureCredentials
                      .getDefaultInstance()) {
            getAzureCredentialsBuilder().mergeFrom(value);
          } else {
            azureCredentials_ = value;
          }
        } else {
          azureCredentialsBuilder_.mergeFrom(value);
        }
        if (azureCredentials_ != null) {
          bitField0_ |= 0x00000002;
          onChanged();
        }
        return this;
      }
<pre>
Required. Input only. Credentials used to authenticate API requests to
Azure.

For information on our data retention policy for user credentials, see
[User credentials](/storage-transfer/docs/data-retention#user-credentials).
</pre>

<code>
.google.storagetransfer.v1.AzureCredentials azure_credentials = 2 [(.google.api.field_behavior) = REQUIRED, (.google.api.field_behavior) = INPUT_ONLY];
</code>
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java