Add some test and fix stuff

internal/db/dbModels/supertoken_test.go

internal/endpoints/redirect/redirectEndpoint.go

internal/jws/jws.go

internal/jws/jws_test.go

internal/oidc/authcode/authcode.go

internal/oidc/authcode/authcode_test.go

internal/supertoken/capabilities/capability.go

internal/supertoken/event/event_test.go

internal/supertoken/event/pkg/event_test.go

internal/supertoken/pkg/supertoken.go

internal/supertoken/pkg/supertoken_test.go

internal/supertoken/restrictions/restriction.go

internal/supertoken/supertoken.go

...nal/utils/issuerUtils/issuerUtilsCompareIssuerURL_test.go

internal/utils/utils.go

internal/utils/utilsSliceUnion_test.go

internal/utils/utilsUniqueSlice_test.go