Implement access token for command line things.

app/User.php

@@ -136,6 +136,16 @@ class User extends Authenticatable
         return $this->hasMany('FireflyIII\Models\ExportJob');
     }
 
+    /**
+     * @return string
+     */
+    public function generateAccessToken(): string
+    {
+        $bytes = random_bytes(16);
+
+        return strval(bin2hex($bytes));
+    }
+
     /**
      * Checks if the user has a role by its name.
      *