devise omniauth failure notice

config/locales/en.yml

@@ -74,6 +74,8 @@ en:
       two_factor_authentication_code:
         subject: "Two-factor authentication code"
         text_html: "Your two-factor authentication code for %{university} is: <br><br><b>%{code}</b><br><br>It will expire in 5 minutes."
+    omniauth_callbacks:
+      failure: "Failed to sign in."
     sessions:
       signed_in: ''
     shared:

config/locales/fr.yml

@@ -74,6 +74,8 @@ fr:
       two_factor_authentication_code:
         subject: "Code d'authentification à deux facteurs"
         text_html: "Votre code d'authentification pour %{university} est :<br><br><b>%{code}</b><br><br>Il expirera dans 5 minutes."
+    omniauth_callbacks:
+      failure: "Échec de l'authentification."
     sessions:
       signed_in: ''
     shared: