bump max name length to 32 characters

spec/models/user_spec.rb

@@ -9,7 +9,7 @@ describe User, type: :model do
 
   context 'validations' do
     it { should validate_presence_of(:name) }
-    it { should validate_length_of(:name).is_at_most(24) }
+    it { should validate_length_of(:name).is_at_most(32) }
 
     it { should validate_presence_of(:provider) }