fix post bug

Author: PanJiaChen

src/api/login.js

@@ -8,7 +8,7 @@ export function loginByEmail(email, password) {
   return fetch({
     url: '/login/loginbyemail',
     method: 'post',
-    params: data
+    data
   });
 }
 

src/mock/login.js

@@ -25,7 +25,7 @@ const userMap = {
 
 export default {
   loginByEmail: config => {
-    const { email } = config.params;
+    const { email } = JSON.parse(config.data);
     return new Promise((resolve, reject) => {
       if (userMap[email.split('@')[0]]) {
         setTimeout(() => {