This made me think. Why do we store the 'bearer' in the connection anyway? Isn't the bearer rather per-transfer? I.e shouldn't it be moved from struct connectdata to struct Curl_easy ?

The disable verbose build in travis failed:

I presume you need to make 'data' available in that function unconditionally.

http.c: In function ‘output_auth_headers’:
http.c:710:19: error: ‘data’ undeclared (first use in this function); did you mean ‘path’?
     if((!proxy && data->set.str[STRING_BEARER] &&
                   ^~~~
                   path

Thanks!