User.php

<?php

namespace App;

use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;

/**
 * App\User
 *
 * @property int $id
 * @property string $name
 * @property string $email
 * @property string $password
 * @property string|null $remember_token
 * @property \Illuminate\Support\Carbon|null $created_at
 * @property \Illuminate\Support\Carbon|null $updated_at
 * @property-read int|null $notifications_count
 * @property-read \Illuminate\Database\Eloquent\Collection|\App\Organization[] $organizations
 * @property-read int|null $organizations_count
 * @method static \Illuminate\Database\Eloquent\Builder|User newModelQuery()
 * @method static \Illuminate\Database\Eloquent\Builder|User newQuery()
 * @method static \Illuminate\Database\Eloquent\Builder|User query()
 * @method static \Illuminate\Database\Eloquent\Builder|User whereCreatedAt($value)
 * @method static \Illuminate\Database\Eloquent\Builder|User whereEmail($value)
 * @method static \Illuminate\Database\Eloquent\Builder|User whereId($value)
 * @method static \Illuminate\Database\Eloquent\Builder|User whereName($value)
 * @method static \Illuminate\Database\Eloquent\Builder|User wherePassword($value)
 * @method static \Illuminate\Database\Eloquent\Builder|User whereRememberToken($value)
 * @method static \Illuminate\Database\Eloquent\Builder|User whereUpdatedAt($value)
 * @mixin \Eloquent
 */
class User extends Authenticatable
{
    use Notifiable;

    /**
     * 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',
    ];

    public function organizations()
    {
        return $this->belongsToMany('App\Organization');
    }

    public function ownsOrganization(Organization $organization)
    {
        foreach ($this->organizations as $o) {
            if ($o->id == $organization->id) {
                return true;
            }
        }

        return false;
    }

    public static function findByEmail($email)
    {
        return self::where("email", $email)->first();
    }
}