name exception for kammiu

app/models/domain/fa/user.rb

@@ -155,13 +155,16 @@ class Domain::Fa::User < ReduxApplicationRecord
     end
   end
 
+  URL_NAME_EXCEPTIONS = {
+    "Kammiu" => "rammiu",
+  }
   def self.name_to_url_name(name)
-    name.
+    name = name.strip
+    URL_NAME_EXCEPTIONS[name] || name.
       delete("_").
       delete("!").
       delete("∞").
-      downcase.
-      strip
+      downcase
   end
 
   # TODO - write method for getting suggested users to follow

spec/models/domain/fa/user_spec.rb

@@ -57,6 +57,13 @@ describe Domain::Fa::User do
     }).errors.full_messages).to be_empty
   end
 
+  it "allows the rammiu exception" do
+    expect(described_class.create({
+      name: "Kammiu",
+      url_name: "rammiu",
+    }).errors.full_messages).to be_empty
+  end
+
   it "cannot be created with uppercase url name" do
     expect(described_class.create({
       name: "Foo",