Resolve "Anmeldung am Servicekonto & Token Erstellung"

Closes #3 (closed)

src/test/java/de/ozgcloud/nachrichten/postfach/osiv2/extension/Jwt.java

@@ -5,7 +5,7 @@ import static de.ozgcloud.nachrichten.postfach.osiv2.factory.JsonUtil.*;
 import java.io.Serializable;
 import java.util.Map;
 
-import org.eclipse.jgit.util.Base64;
+import org.bouncycastle.util.encoders.Base64;
 
 import com.jayway.jsonpath.JsonPath;
 import com.jayway.jsonpath.ReadContext;
@@ -81,7 +81,7 @@ public record Jwt(String token) {
 	}
 
 	private static String base64UrlEncode(String input) {
-		String base64 = Base64.encodeBytes(input.getBytes());
+		var base64 = new String(Base64.encode(input.getBytes()));
 		return base64.replace('+', '-').replace('/', '_').replace("=", "");
 
 	}