SDK-2771: Specify exact json property names for response from auth service

Author: MrBurtyyy

yoti-sdk-auth/src/main/java/com/yoti/auth/CreateAuthenticationTokenResponse.java

@@ -1,10 +1,19 @@
 package com.yoti.auth;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
+
 public final class CreateAuthenticationTokenResponse {
 
+    @JsonProperty("access_token")
     private String accessToken;
+
+    @JsonProperty("token_type")
     private String tokenType;
+
+    @JsonProperty("expires_in")
     private Integer expiresIn;
+
+    @JsonProperty("scope")
     private String scope;
 
     /**