Add a clear message why you could end up there

Signed-off-by: Joas Schilling <coding@schilljs.com>

core/templates/loginflow/authpicker.php

@@ -36,6 +36,10 @@ $urlGenerator = $_['urlGenerator'];
 		])) ?>
 	</p>
 
+	<p class="info">
+		<?php print_unescaped($l->t('If you are not trying to set up a new device or app, someone is trying to trick you into granting them access to your data. In this case do not proceed and instead contact your system administrator.')) ?>
+	</p>
+
 	<br/>
 
 	<p id="redirect-link">

core/templates/loginflowv2/authpicker.php

@@ -35,6 +35,10 @@ $urlGenerator = $_['urlGenerator'];
 		])) ?>
 	</p>
 
+	<p class="info">
+		<?php print_unescaped($l->t('If you are not trying to set up a new device or app, someone is trying to trick you into granting them access to your data. In this case do not proceed and instead contact your system administrator.')) ?>
+	</p>
+
 	<br/>
 
 	<p id="redirect-link">