Error "Cannot create property 'client_id' on string" with scheme refresh and x-www-form-urlencoded

[existe-deja]

Version

module: 5.0.0-1608568767.2fe2217
nuxt: 2.14.12

Nuxt configuration

mode:

• universal
• spa

Nuxt configuration

auth: {
    redirect: {
      login: '/login',
      logout: '/',
      callback: '/dashboard',
      home: '/dashboard'
    },
    strategies: {
      local: {
        scheme: 'refresh',
        token: {
          property: 'access_token',
          required: true,
          type: 'Bearer',
          name: 'Authorization',
          maxAge: 60 * 30
        },
        refreshToken: {
          property: 'refresh_token',
          data: 'refresh_token',
          maxAge: 60 * 30
        },
        user: {
          property: false,
          autoFetch: true
        },
        clientId: process.env.API_KEY,
        endpoints: {
          login: {
            url: '/oauth/token/',
            method: 'post',
            headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
          },
          logout: false,
          user: {
            url: '/users/me/',
            method: 'get'
          }
        }
      }
    }
  }

Reproduction

const formLogin = Object.keys(this.login)
  .map(a => encodeURIComponent(a) + '=' + encodeURIComponent(this.login[a]))
  .join('&')

 try {
  await this.$auth.loginWith('local', { data: formLogin })
} catch (e) {
  console.error(e)
}

What is expected?

I expect clientId from config to be injected in the request data.

What is actually happening?

Because my ata is strongofied, auth module cannot inject my clientId inside the request data.
TypeError: Cannot create property 'client_id' on string 'username=aaa&password=bbb'

if (this.options.clientId) {
  endpoint.data.client_id = this.options.clientId;
}

Steps to reproduce

Try to login with a stringified data.

Additional information

Checklist

• I have tested with the latest Nuxt version and the issue still occurs
• I have tested with the latest module version and the issue still occurs
• I have searched the issue tracker and this issue hasn't been reported yet

[bmulholland]

Per the docs, data should be an object, not a string, so this isn't a bug.

[existe-deja]

Thanks for answering @bmulholland.
I rewrite my question so:
How do I handle a form-urlencoded request?