GMail Api Deprecation

We have received an email from the G Suite team stating that we are using a email setting API that is being deprecated October 2019. I called into G Suite support and they said that it should not effect my account but after sending him the email that I received they were not too sure how to correct it but it appears that our use with wise stamps will be effected come October 2019. How do we correct the issue or do we need to look into other means for signatures?