PlatformException(authorize_and_exchange_code_failed, Failed to authorize: Connection error making token request to 'https://xxx/realms/AAA/protocol/openid-connect/token': The certificate for this server is invalid. You might be connecting to a server that is pretending to be 'xxx' which could put your confidential information at risk...

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Hi to Flutter app auth team.

I'm using the last version of flutter_appauth to connect with Keycloak server. Everything are working well, but I got an error when callback in IOS(it's working fine on Android).
`PlatformException(authorize_and_exchange_code_failed, Failed to authorize: Connection error making token request to 'https://xxx/realms/AAA/protocol/openid-connect/token': The certificate for this server is invalid. You might be connecting to a server that is pretending to be 'xxx' which could put your confidential information at risk...`

For iOS in info.plist:
`CFBundleURLTypes


CFBundleTypeRole
Editor
CFBundleURLSchemes




`
Maybe it's problem from self-signed certificate. How could I solve this problem?

Start with the iOS callback and token exchange described in the issue, then inspect the Info.plist URL-scheme configuration and the iOS-side certificate handling in flutter_appauth. Reproduce the failure against the Keycloak endpoint and document a supported resolution that preserves certificate validation; done means the iOS exchange succeeds without weakening trust checks.

Written by the indexing model from the issue text.