How to use cfx's oauth2

[TheIndra]

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Login with idms.fivem.net (Own client_secret & client_id?)

As explained in other topics on this forums that auth flow is currently not for public use, instead make use of Discourse User API keys You can use the session_info scope to get information about the logged in user. See other topics on this forum, FiveM source code or this repository for examples.