created new api's for login with spid

src/main/java/net/gepafin/tendermanagement/util/Utils.java

@@ -15,6 +15,7 @@ import org.slf4j.LoggerFactory;
 import java.lang.reflect.Field;
 import java.lang.reflect.Type;
 import java.nio.charset.StandardCharsets;
+import java.security.SecureRandom;
 import java.util.Base64;
 import java.util.List;
 import java.util.Map;
@@ -161,4 +162,32 @@ public class Utils {
 			}
 		}
 	}
+
+	public static String encodeData(String data) {
+        return Base64.getEncoder().encodeToString(data.getBytes(StandardCharsets.UTF_8));
+    }
+
+    public static String decodeData(String token) {
+        byte[] decodedBytes = Base64.getDecoder().decode(token);
+        return new String(decodedBytes, StandardCharsets.UTF_8);
+    }
+
+	public static String generateSecureToken() {
+        SecureRandom secureRandom = new SecureRandom();
+        byte[] tokenBytes = new byte[24];
+        secureRandom.nextBytes(tokenBytes);
+        String token = Base64.getUrlEncoder().withoutPadding().encodeToString(tokenBytes);
+        log.debug("Generated secure token: {}", token);
+        return token;
+    }
+
+	public static Map<String, List<Object>> convertStringIntoMap(String jsonString) {
+		try {
+			return mapper.readValue(jsonString, new TypeReference<Map<String, List<Object>>>() {
+			});
+		} catch (Exception e) {
+			log.error("Error converting object: " + e.getMessage(), e);
+			return null;
+		}
+	}
 }