fix: token provider correctly checks token validity

Author: tsmbl

packages/sdk/src/auth/token-provider.ts

@@ -67,11 +67,7 @@ export class CachedTokenProvider extends TokenProvider {
     const existingToken = this.getCachedToken();
     const subject = this.subject.toString();
 
-    if (
-      existingToken &&
-      this.tokenValidator.canValidate(existingToken.header) &&
-      this.tokenValidator.isSignatureValid(existingToken)
-    ) {
+    if (existingToken && this.tokenValidator.isValid(existingToken)) {
       return existingToken;
     }
     const existingDelegatePromise = this.delegateGetPromises[subject];