Extract generate token method (#488)

* Extract generate token method

* Update comment

* Update comment

* Update HasApiTokens.php

---------

Co-authored-by: Taylor Otwell <[email protected]>

Author: mowangjuanzi

src/HasApiTokens.php

@@ -45,12 +45,7 @@ public function tokenCan(string $ability)
      */
     public function createToken(string $name, array $abilities = ['*'], DateTimeInterface $expiresAt = null)
     {
-        $plainTextToken = sprintf(
-            '%s%s%s',
-            config('sanctum.token_prefix', ''),
-            $tokenEntropy = Str::random(40),
-            hash('crc32b', $tokenEntropy)
-        );
+        $plainTextToken = $this->generateTokenString();
 
         $token = $this->tokens()->create([
             'name' => $name,
@@ -62,6 +57,21 @@ public function createToken(string $name, array $abilities = ['*'], DateTimeInte
         return new NewAccessToken($token, $token->getKey().'|'.$plainTextToken);
     }
 
+    /**
+     * Generate the token string.
+     *
+     * @return string
+     */
+    public function generateTokenString()
+    {
+        return sprintf(
+            '%s%s%s',
+            config('sanctum.token_prefix', ''),
+            $tokenEntropy = Str::random(40),
+            hash('crc32b', $tokenEntropy)
+        );
+    }
+
     /**
      * Get the access token currently associated with the user.
      *