controllo che un utente abbia uno slug valido prima di rindirizzarlo al profilo
controllo che un utente abbia uno slug valido prima di rindirizzarlo al profilo

artcz/epcon,EuroPython/epcon,barrachri/epcon,PythonSanSebastian/epcon,PythonSanSebastian/epcon,EuroPython/epcon,matrixise/epcon,artcz/epcon,malemburg/epcon,barrachri/epcon,PythonSanSebastian/epcon,malemburg/epcon,artcz/epcon,barrachri/epcon,PythonSanSebastian/epcon,pythonitalia/conference,PythonSanSebastian/conference,malemburg/epcon,pythonitalia/conference,barrachri/epcon,barrachri/epcon,matrixise/epcon,artcz/epcon,PythonSanSebastian/conference,yakky/conference,matrixise/epcon,EuroPython/epcon,EuroPython/epcon,matrixise/epcon,PythonSanSebastian/conference,barrachri/epcon,yakky/conference,artcz/epcon,pythonitalia/conference,malemburg/epcon,malemburg/epcon,matrixise/epcon,PythonSanSebastian/epcon,PythonSanSebastian/epcon,artcz/epcon,matrixise/epcon,malemburg/epcon