gistfile1.txt

// Resolver for login mutation
    async logIn(root, {emailOrUsername, password}) {
      const user = await User.authenticate(emailOrUsername, password)
      if(user)
        return {
          token: buildMacaroon(user).serialize(),
          user
        }
      else if(user == false)
        throw new Error("Incorrect password")
      else
        throw new Error("User not found")
    }

// Mutation call using vue-apollo
    async submit(e) {
      const success = await this.$validator.validateAll()
      if(!success)
        return
      try {
        const {data} = await this.$apollo.mutate({
          mutation: gql`mutation($emailOrUsername: String!, $password: String!) {
            logIn(
              emailOrUsername: $emailOrUsername,
              password: $password
            ) {
              token
              user {
                username
              }
            }
          }`,
          variables: {
            emailOrUsername: this.emailOrUsername,
            password: this.password
          }
        })
        if(data.logIn) {
          this.setToken(data.logIn.token)
          this.setUsername(data.logIn.user.username)
          this.$apollo.provider.defaultClient.resetStore()
          this.$router.push({name: "index"})
        }
      } catch(e) {
        console.error("got an error", e)
      }
    }