updated the rules when linking OAuth2 by email

mails/templates/password_login_alert.go

@@ -0,0 +1,30 @@
+package templates
+
+// Available variables:
+//
+// ```
+// Record        *models.Record
+// AppName       string
+// AppUrl        string
+// ProviderNames []string
+// ```
+const PasswordLoginAlertBody = `
+{{define "content"}}
+	<p>Hello,</p>
+	<p>
+		Just to let you know that someone has logged in to your {{.AppName}} account using a password while you already have
+		OAuth2
+		{{range $index, $provider := .ProviderNames }}
+			{{if $index}}|{{end}}
+		    {{ $provider }}
+		{{ end }}
+		auth linked.
+	</p>
+	<p>If you have recently signed in with a password, you may disregard this email.</p>
+	<p><strong>If you don't recognize the above action, you should immediately change your {{.AppName}} account password.</strong></p>
+	<p>
+	  Thanks,<br/>
+	  {{.AppName}} team
+	</p>
+{{end}}
+`