/admin/doSignup: Allow hiding the temporary password and adding a message to the email

src/main/java/org/jenkinsci/account/AdminUI.java

@@ -105,11 +105,13 @@ public HttpResponse doDoSignup(
             @QueryParameter String userid,
             @QueryParameter String firstName,
             @QueryParameter String lastName,
-            @QueryParameter String email
+            @QueryParameter String email,
+            @QueryParameter boolean skipPassword,
+            @QueryParameter String message
     ) throws NamingException, MessagingException {
         String password = app.createRecord(userid, firstName, lastName, email);
 
-        app.new User(userid,email).mailPassword(password);
+        app.new User(userid,email).mailAccountCreated(!skipPassword, password, message);
 
         return HttpResponses.plainText("Created");
     }

src/main/java/org/jenkinsci/account/Application.java

@@ -435,6 +435,20 @@ public void mailPassword(String password) throws MessagingException {
                 "Please visit " + getUrl() + " and update your password and profile\n", "text/plain");
         }
 
+        /**
+         * Sends a new password to this user.
+         */
+        public void mailAccountCreated(boolean sendPassword, String password, @CheckForNull String message) throws MessagingException {
+            mail("Admin <admin@jenkins-ci.org>", mail, "New account on the Jenkins project infrastructure", 
+                "Dear recipient, \n\n" +
+                "We have created a new Jenkins project account for you. Your new user ID is " + id + "\n" +
+                ( sendPassword ? "Your temporary password is " + password + "\n" : "" ) +
+                ( StringUtils.isNotBlank(message) ? message + "\n" : "" ) +
+                "\n" +
+                ( sendPassword ? "Please visit " + getUrl() + " and update your password and profile\n" : "" ), 
+                "text/plain");
+        }
+
         /**
          * Sends a new password and a password reset notification to this user.
          */