in app.py [0:0]
def signup():
"""The first step in the three-legged OAuth handshake.
You should navigate here first. It will redirect to login.uber.com.
"""
params = {
'response_type': 'code',
'redirect_uri': get_redirect_uri(request),
'scopes': ','.join(config.get('scopes')),
}
url = generate_oauth_service().get_authorize_url(**params)
return redirect(url)