diff --git a/library/src/main/java/org/casdoor/Casdoor.kt b/library/src/main/java/org/casdoor/Casdoor.kt
index d46f94a..905a8cf 100644
--- a/library/src/main/java/org/casdoor/Casdoor.kt
+++ b/library/src/main/java/org/casdoor/Casdoor.kt
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.casdoor
 
 import com.squareup.moshi.Moshi
@@ -49,7 +50,7 @@ class Casdoor(private val config: CasdoorConfig) {
      */
     fun getSignInUrl(scope: String? = null, state: String? = null): String {
         this.codeVerifier = Utils.generateCodeVerifier()
-        val url = "${config.endpoint}login/oauth/authorize"
+        val url = "${config.endpoint}/login/oauth/authorize"
         this.nonce = Utils.generateNonce()
         val query = CodeRequestQuery(
             config = config,
@@ -81,7 +82,7 @@ class Casdoor(private val config: CasdoorConfig) {
      */
     fun requestOauthAccessToken(code: String): AccessTokenResponse {
 
-        var httpUrl = "${config.endpoint}login/oauth/access_token".toHttpUrlOrNull()
+        var httpUrl = "${config.endpoint}/login/oauth/access_token".toHttpUrlOrNull()
         httpUrl ?: throw IllegalArgumentException("Invalid URL")
         httpUrl = AccessTokenRequest(
             code = code,
@@ -110,7 +111,7 @@ class Casdoor(private val config: CasdoorConfig) {
      */
     fun renewToken(refreshToken: String, scope: String? = null): AccessTokenResponse {
 
-        var httpUrl = "${config.endpoint}login/oauth/refresh_token".toHttpUrlOrNull()
+        var httpUrl = "${config.endpoint}/login/oauth/refresh_token".toHttpUrlOrNull()
         httpUrl ?: throw IllegalArgumentException("Invalid URL")
         httpUrl = RenewAccessTokenRequest(
             refreshToken = refreshToken,
@@ -138,7 +139,7 @@ class Casdoor(private val config: CasdoorConfig) {
      * Logout.
      */
     fun logout(idToken: String, state: String? = null): Boolean {
-        var httpUrl = "${config.endpoint}login/oauth/logout".toHttpUrlOrNull()
+        var httpUrl = "${config.endpoint}/login/oauth/logout".toHttpUrlOrNull()
         httpUrl ?: throw IllegalArgumentException("Invalid URL")
         httpUrl = httpUrl.newBuilder()
             .addQueryParameter("id_token_hint", idToken)
diff --git a/library/src/main/java/org/casdoor/CasdoorConfig.kt b/library/src/main/java/org/casdoor/CasdoorConfig.kt
index aac5dd9..688069f 100644
--- a/library/src/main/java/org/casdoor/CasdoorConfig.kt
+++ b/library/src/main/java/org/casdoor/CasdoorConfig.kt
@@ -13,12 +13,13 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.casdoor
 
 /**
  *
  *
- * Casdoor Config Model
+ * Casdoor Config
  */
 data class CasdoorConfig(
     val clientID: String,
@@ -26,17 +27,4 @@ data class CasdoorConfig(
     val redirectUri: String,
     var endpoint: String,
     val appName: String,
-) {
-
-
-    init {
-        endpoint = formatEndpoint(endpoint)
-    }
-
-    private fun formatEndpoint(url: String): String {
-        val trimmedUrl = url.trim()
-        return if (trimmedUrl.endsWith("/")) trimmedUrl else "$trimmedUrl/"
-    }
-
-
-}
+)
diff --git a/library/src/main/java/org/casdoor/Models.kt b/library/src/main/java/org/casdoor/Models.kt
index 28217ef..aeefda5 100644
--- a/library/src/main/java/org/casdoor/Models.kt
+++ b/library/src/main/java/org/casdoor/Models.kt
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.casdoor
 
 import com.squareup.moshi.Json
diff --git a/library/src/main/java/org/casdoor/Utils.kt b/library/src/main/java/org/casdoor/Utils.kt
index 32388b4..a471fe4 100644
--- a/library/src/main/java/org/casdoor/Utils.kt
+++ b/library/src/main/java/org/casdoor/Utils.kt
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.casdoor
 
 import android.util.Base64
diff --git a/library/src/test/java/org/casdoor/CasdoorConfigTest.kt b/library/src/test/java/org/casdoor/CasdoorConfigTest.kt
index 83f9635..4e32e2a 100644
--- a/library/src/test/java/org/casdoor/CasdoorConfigTest.kt
+++ b/library/src/test/java/org/casdoor/CasdoorConfigTest.kt
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.casdoor
 
 import org.junit.Assert.assertEquals
diff --git a/library/src/test/java/org/casdoor/UtilsTest.kt b/library/src/test/java/org/casdoor/UtilsTest.kt
index 7a9a119..2b77512 100644
--- a/library/src/test/java/org/casdoor/UtilsTest.kt
+++ b/library/src/test/java/org/casdoor/UtilsTest.kt
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.casdoor
 
 import org.junit.Assert.assertEquals