Auth :: attempt总是返回false，我也不知道为什么

public function login( Request $request ) {

        $fields = [
            'email' => $request->email,
            'password' => $request->password,
        ];

        $access = Auth::attempt( $fields );
      echo $access;
        if ( $access ) {

            $user = Auth::teacher();
            $token = $user->createToken('MyApp')->accessToken;

            return response()->json( [
                "message" => "Login realizado com sucesso!",
                "data" => [
                    'user' => $user,
                    'token' => $token
                ]
            ], 200 );

        } else {

            return response()->json( [
                "message" => "Email ou senha inválidos!",
                "data" => null,
                "return" => $access,
            ], 401 );

        }

我可以使用此功能登录，我尝试过使用Model Teacher，但始终auth::attempt给我错误，但是如果尝试使用User Model，则结果为true。

我的模特老师

<?php

namespace App;

use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
use Laravel\Passport\HasApiTokens;
use App\Student;
use App\Rating;
use App\Commentary;
use App\User;

class Teacher extends Authenticatable
{
  use Notifiable;
  use HasApiTokens;

  /**
   * The attributes that are mass assignable.
   *
   * @var array
   */
  protected $fillable = [
      'name', 'email', 'password',
  ];

  /**
   * The attributes that should be hidden for arrays.
   *
   * @var array
   */
  protected $hidden = [
      'password', 'remember_token',
  ];

  /**
   * The attributes that should be cast to native types.
   *
   * @var array
   */
  protected $casts = [
      'email_verified_at' => 'datetime',
  ];
    public function students(){
        return $this->belongsToMany('App\Student')->withTimestamps();
    }
    public function ratings(){
      return $this->hasMany('App\Rating');
    }
    public function commentaries(){
      return $this->hasMany('App\Commentary');
    }

    public function updateTeacher(Request $req){
        $validator = Validator::make($request->all(),[
        ]);
        if($validator->fails()){
          return response()->json($validator->errors());
        }
        if ($req->name)
            $this->name = $req->name;
        if ($req->email)
            $this->email = $req->email;
        if ($req->password)
            $this->password = $req->password;
        if ($req->number)
            $this->number = $req->number;
        if ($req->birth)
            $this->birth = $req->birth;
        if ($req->CPF)
            $this->CPF = $req->CPF;
        if ($req->lesson_price)
            $this->lesson_price = $req->lesson_price;
        if ($req->rent_price)
            $this->rent_price = $req->rent_price;
        if ($req->description)
            $this->description = $req->description;
        if ($req->district)
            $this->district = $req->district;
        if ($req->zone)
            $this->zone = $req->zone;
        if ($req->instruments)
            $this->instruments = $req->instruments;
        if ($req->certification)
            $this->certification = $req->certification;
        $this->save();
    }
    public function listTeachers(){
      $paginator = Teacher::paginate(10);
      return response()->json([$paginator]);
    }
    public function showTeacher($id){
      $teacher = Teacher::findOrFail($id);
      return response()->json([$teacher]);
    }

}

我的模型使用者

<?php

namespace App;

use Illuminate\Contracts\Auth\MustVerifyEmail;
use Illuminate\Foundation\Auth\User as Authenticatable;
use Illuminate\Notifications\Notifiable;
use Laravel\Passport\HasApiTokens;

class User extends Authenticatable
{
    use Notifiable;
    use HasApiTokens;

    /**
     * The attributes that are mass assignable.
     *
     * @var array
     */
    protected $fillable = [
        'name', 'email', 'password',
    ];

    /**
     * The attributes that should be hidden for arrays.
     *
     * @var array
     */
    protected $hidden = [
        'password', 'remember_token',
    ];

    /**
     * The attributes that should be cast to native types.
     *
     * @var array
     */
    protected $casts = [
        'email_verified_at' => 'datetime',
    ];
}

因此，我认为教师具有相同的功能和大多数操作（如用户），因此该功能auth::attempt应与教师一起使用。