# Functions
DoFlowAndUpdate uses a refresh token to obtain a new access token; if the refresh token changes, the UpdateChangedRT function is used to update the refresh token.
DoFlowAndUpdateDB uses a refresh token to obtain a new access token; if the refresh token changes, it is updated in the database.
DoFlowWithoutUpdate uses a refresh token to obtain a new access token; if the refresh token changes, this is ignored.
# Type aliases
UpdateChangedRT is a function that should update a refresh token, it takes the old value as well as the new one.