M21: add optional organisation identity

frontend/src/i18n/locales/en-GB/auth.json

@@ -23,5 +23,7 @@
   "emailLabel": "Email address",
   "passwordLabel": "Password",
   "signIn": "Sign in",
-  "passwordLoginFailed": "Sign-in failed. Check your credentials."
+  "passwordLoginFailed": "Sign-in failed. Check your credentials.",
+  "or": "or",
+  "signInWithOrganization": "Sign in with {{provider}}"
 }

frontend/src/i18n/locales/fr-BE/auth.json

@@ -23,5 +23,7 @@
   "emailLabel": "Adresse e-mail",
   "passwordLabel": "Mot de passe",
   "signIn": "Se connecter",
-  "passwordLoginFailed": "Connexion impossible. Vérifiez vos identifiants."
+  "passwordLoginFailed": "Connexion impossible. Vérifiez vos identifiants.",
+  "or": "ou",
+  "signInWithOrganization": "Se connecter avec {{provider}}"
 }

frontend/src/i18n/locales/nl-BE/auth.json

@@ -23,5 +23,7 @@
   "emailLabel": "E-mailadres",
   "passwordLabel": "Wachtwoord",
   "signIn": "Aanmelden",
-  "passwordLoginFailed": "Aanmelden mislukt. Controleer je gegevens."
+  "passwordLoginFailed": "Aanmelden mislukt. Controleer je gegevens.",
+  "or": "of",
+  "signInWithOrganization": "Aanmelden met {{provider}}"
 }