fix SpotifyAPI#isTokenValid logic

Author: adamint

README.md

@@ -29,7 +29,7 @@ repositories {
     jcenter()
 }
 
-compile group: 'com.adamratzman', name: 'spotify-api-kotlin', version: '2.3.06'
+compile group: 'com.adamratzman', name: 'spotify-api-kotlin', version: '2.3.07'
 ```
 
 To use the latest snapshot instead, you must add the Jitpack repository as well
@@ -51,7 +51,7 @@ dependencies {
 <dependency>
     <groupId>com.adamratzman</groupId>
     <artifactId>spotify-api-kotlin</artifactId>
-    <version>2.3.06</version>
+    <version>2.3.07</version>
 </dependency>
 
 <repository>

build.gradle

@@ -22,7 +22,7 @@ apply plugin: 'kotlin'
 apply plugin: 'org.jetbrains.dokka'
 
 group 'com.adamratzman'
-version '2.3.06'
+version '2.3.07'
 
 archivesBaseName = 'spotify-api-kotlin'
 

src/main/kotlin/com/adamratzman/spotify/SpotifyAPI.kt

@@ -171,7 +171,7 @@ abstract class SpotifyAPI internal constructor(
      * @return [TokenValidityResponse] containing whether this token is valid, and if not, an Exception explaining why
      */
     fun isTokenValid(makeTestRequest: Boolean = true): TokenValidityResponse {
-        if (!token.shouldRefresh()) return TokenValidityResponse(false, SpotifyException("Token expired"))
+        if (token.shouldRefresh()) return TokenValidityResponse(false, SpotifyException("Token needs to be refreshed (is it expired?)"))
         if (!makeTestRequest) return TokenValidityResponse(true, null)
 
         return try {