Custom social connection - Failed to obtain access token

[danm364]

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Good Afternoon,

I am trying to add a custom connection. I have the custom connections setup with all the right information. However I am receiving the below error message

I believe this to be due to an issue with the state. I can obtain the accesstoken on postman where i set the state to a constant few letters. However the moment I test the social connection with Auth0 I get the above error. As can be seen this is the state from this url:

https://{appname}.us.auth0.com/authorize/resume?state=kUxR-TXJum_chz663PgOijzRSRiyFYGC

state on callback:
https://{appname}/login/callback?state=0R87QuEmTWvLGOrcblpIuJd7agoDvqJ-

I’m unsure on what I can do to correct the issue can you provide any insights?

[mukund_bs]

@danm364 probably the external IdP only allows GET requests for access tokens(Token endpoint). We are facing a similar situation

Auth0 team @auth_support do you have any suggestions on this?

[vlad.murarasu]

Hi @danm364,

Welcome to the Auth0 Community!

Please refer to this Knowledge article for finding a solution to the error:

Custom Social Connection Fails to Obtain Access Token

Problem statement Login attempts with a new Custom Social Connection fail with 502 / 503 / 504 and similar status code errors or an “InternalOAuthError: Failed to obtain access token” error. Symptoms We get the following error: "failed to obtain the access token" Troubleshooting The custom social connection implements the OAuth2 Authorization Code Grant flow between Auth0 and the social IdP. After the user login via social IdP successfully, the social IdP sends the code and state back to Auth…

If you have any other question feel free to reach out.

Have a good one,
Vlad