Fix POST url for adding teacher

client/client.go

@@ -632,7 +632,7 @@ func (c *Client) AddTeacher(teacher *orm.Teacher) error {
 	if err != nil {
 		return err
 	}
-	resp, err := c.SendRequest("POST", "/api/teachers/add/?format=json", data)
+	resp, err := c.SendRequest("POST", "/api/teachers/create/?format=json", data)
 	if err != nil {
 		return err
 	}