搜索课程老师接口参数增加

app/views/courses/search_teacher_candidate.json.jbuilder

@@ -3,6 +3,7 @@ json.candidates do
     json.id user.id
     json.name user.real_name
     json.nickname user.nickname
+    json.login user.login
     json.school_name user.user_extension.school.try(:name)
     json.school_id user.user_extension.school.try(:id)
     json.added @course.course_member?(user.id, [1, 2, 3])