Handle a request for json on a an external request - return the user_name attribute instead of a full user model. Fixes #715.
Handle a request for json on a an external request - return the user_name attribute instead of a full user model. Fixes #715.

andreicristianpetcu/alaveteli,hasadna/alaveteli,andreicristianpetcu/alaveteli_old,petterreinholdtsen/alaveteli,hasadna/alaveteli,datauy/alaveteli,andreicristianpetcu/alaveteli,hasadna/alaveteli,datauy/alaveteli,10layer/alaveteli,petterreinholdtsen/alaveteli,andreicristianpetcu/alaveteli_old,petterreinholdtsen/alaveteli,datauy/alaveteli,nzherald/alaveteli,4bic/alaveteli,4bic/alaveteli,TEDICpy/QueremoSaber,andreicristianpetcu/alaveteli_old,petterreinholdtsen/alaveteli,nzherald/alaveteli,4bic/alaveteli,hasadna/alaveteli,codeforcroatia/alaveteli,andreicristianpetcu/alaveteli_old,Br3nda/alaveteli,andreicristianpetcu/alaveteli,petterreinholdtsen/alaveteli,Br3nda/alaveteli,andreicristianpetcu/alaveteli,hasadna/alaveteli,nzherald/alaveteli,Br3nda/alaveteli,obshtestvo/alaveteli-bulgaria,andreicristianpetcu/alaveteli,obshtestvo/alaveteli-bulgaria,andreicristianpetcu/alaveteli_old,hasadna/alaveteli,10layer/alaveteli,4bic/alaveteli,TEDICpy/QueremoSaber,nzherald/alaveteli,codeforcroatia/alaveteli,obshtestvo/alaveteli-bulgaria,TEDICpy/QueremoSaber,codeforcroatia/alaveteli,TEDICpy/QueremoSaber,4bic/alaveteli,10layer/alaveteli,obshtestvo/alaveteli-bulgaria,nzherald/alaveteli,Br3nda/alaveteli,Br3nda/alaveteli,obshtestvo/alaveteli-bulgaria,codeforcroatia/alaveteli,TEDICpy/QueremoSaber