add refresh token to client_credentials saveToken #351
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Summary
TLDR: fixes #350
For some reason, the library doesn't include the refresh token when saving the access token during client_credentials flows, but it does for the authorization_code flow. In the event that you need to generate tokens for anonymous users (guests), the client credentials grant is necessary, and the refresh token should be provided.
Linked issue(s)
#350
Involved parts of the project
client_credentials grant flow
Added tests?
No tests
OAuth2 standard
https://datatracker.ietf.org/doc/html/rfc6749#appendix-A.17 (page 44)
https://www.oauth.com/oauth2-servers/access-tokens/access-token-response/ (refresh token section)
Reproduction
Issue a token using client_credentials grant and see the refresh token now exists as it does for the authorization_code grant