diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/authentication/DefaultAuthenticationService.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/authentication/DefaultAuthenticationService.java
index 4cdc96e14af..96a1a2d023f 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/authentication/DefaultAuthenticationService.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/authentication/DefaultAuthenticationService.java
@@ -33,6 +33,9 @@
 import io.vertx.ext.auth.JWTOptions;
 import io.vertx.ext.auth.User;
 import io.vertx.ext.auth.authentication.AuthenticationProvider;
+import io.vertx.ext.auth.authentication.Credentials;
+import io.vertx.ext.auth.authentication.TokenCredentials;
+import io.vertx.ext.auth.authentication.UsernamePasswordCredentials;
 import io.vertx.ext.auth.jwt.JWTAuth;
 import io.vertx.ext.auth.jwt.JWTAuthOptions;
 import io.vertx.ext.web.RoutingContext;
@@ -166,7 +169,7 @@ public void handleLogin(final RoutingContext routingContext) {
 
   private void login(
       final RoutingContext routingContext, final AuthenticationProvider credentialAuthProvider) {
-    final JsonObject requestBody = routingContext.getBodyAsJson();
+    final JsonObject requestBody = routingContext.body().asJsonObject();
 
     if (requestBody == null) {
       routingContext
@@ -181,8 +184,10 @@ private void login(
     final JsonObject authParams = new JsonObject();
     authParams.put(USERNAME, requestBody.getValue(USERNAME));
     authParams.put("password", requestBody.getValue("password"));
+    final Credentials credentials = new UsernamePasswordCredentials(authParams);
+
     credentialAuthProvider.authenticate(
-        authParams,
+        credentials,
         r -> {
           if (r.failed()) {
             routingContext
@@ -227,7 +232,7 @@ public void authenticate(final String token, final Handler<Optional<User>> handl
     try {
       getJwtAuthProvider()
           .authenticate(
-              new JsonObject().put("token", token),
+              new TokenCredentials(new JsonObject().put("token", token)),
               r -> {
                 if (r.succeeded()) {
                   final Optional<User> user = Optional.ofNullable(r.result());