actually add fingerprint to manage mail template

src/mail.rs

@@ -22,6 +22,7 @@ mod context {
 
     #[derive(Serialize, Clone)]
     pub struct Manage {
+        pub primary_fp: String,
         pub uri: String,
         pub base_uri: String,
         pub domain: String,
@@ -90,9 +91,10 @@ impl Service {
         )
     }
 
-    pub fn send_manage_token(&self, recipient: &Email, link_path: &str)
-                             -> Result<()> {
+    pub fn send_manage_token(&self, tpk_name: String, recipient: &Email,
+                             link_path: &str) -> Result<()> {
         let ctx = context::Manage {
+            primary_fp: tpk_name,
             uri: format!("{}{}", self.base_uri, link_path),
             base_uri: self.base_uri.clone(),
             domain: self.domain.clone(),

src/web/manage.rs

@@ -147,10 +147,11 @@ pub fn vks_manage_post(
     }
 
     let fpr: Fingerprint = tpk.fingerprint().try_into().unwrap();
+    let fpr_text = fpr.to_string();
     let token = token_service.create(&StatelessVerifyToken { fpr });
     let link_path = uri!(vks_manage_key: token).to_string();
 
-    if let Err(e) = mail_service.send_manage_token(&email, &link_path) {
+    if let Err(e) = mail_service.send_manage_token(fpr_text, &email, &link_path) {
         return MyResponse::ise(e);
     }