未处理的运行时错误 SyntaxError：来自 SignIn 或 SignOut next-auth 的 JSON 输入意外结束

Question

接下来，当我使用带有身份验证凭据的 SignIn 或 SignOut 时，出现未处理的运行时错误 SyntaxError: Unexpected end of JSON input。

该错误很奇怪，因为显示弹出下一个错误，但注册了令牌和会话

错误

这是我的授权码和凭据：

CredentialsProvider({
      id: 'credentials',
      name: 'Credenciales',

      async authorize(credentials, req) {
        if (!(credentials.email.length > 0) || !(credentials.password.length > 0)) {
          throw new Error('Email or password was not provided');
        }
        const formData = new FormData();
        formData.append('username', credentials.email);
        formData.append('password', credentials.password);
        formData.append('client_id', credentials.rif);
        
        const url = `${process.env.BACK_ENDPOINT}/login/`
        
        const response = await fetch(url,{
          method: 'POST',
          body: formData
        });
        if (response.status === 401) {
          return {
            'details': 'error',
            'message': 'The username or password is not valid'
          }
        }
      
        if (response.status === 500) {
          throw new Error('Have been an error');
        }
        const data = await response.json();
        if (response.status > 400 && response.status < 500) {
          console.error(data)
          if (data.detail) {
            throw data.message;
          }
          throw data;
        }
        if(data.details === 'success'){
          return data
        }
        return null
      }
    }),

这是我的登录回调：

signIn: async({ user, account, profile, email, credentials }) => {  
      // console.log('signIn', {user, account, profile, email, credentials})
      if (account.type === 'credentials'){
        if(user.details === 'success') return true
        if(user.details === 'error') return false
      }
},

这是我在前端的 onsubmit 句柄：

      const objectValues= {
        email: values.email,
        password: values.password,
        rif: values.rif,
        callbackUrl: '/',
      }
      signIn('credentials', objectValues)

Answer 1

我发现“错误”：在 [...nextauth].js 的回调中，我进行了重定向回调，那里没有任何内容，它总是执行而不返回：

Callbacks:{
    jwt: ({token, user, account, isNewUser}) =>{
        some code...
    },

    redirect: async ({url, baseUrl}) => { 
        // NOTHING OF CODE
    },

    session: ({session, token}) => {
        some code...
    },

    signIn: async({ user, account, profile, email, credentials }) => {
        some code...
    }  
}

下次我将提供有关我的代码和问题的更多详细信息，抱歉。感谢@Bravo抽出时间。