models: able to rename user with diff letter cases #981

- templates/org: mirror fix on name output
- routers: add missing error check

models/org.go

@@ -93,7 +93,7 @@ func CreateOrganization(org, owner *User) (*User, error) {
 		return nil, ErrUserNameIllegal
 	}
 
-	isExist, err := IsUserExist(org.Name)
+	isExist, err := IsUserExist(0, org.Name)
 	if err != nil {
 		return nil, err
 	} else if isExist {