Cannot Access the Servlet

package com.geeks.demo.core.servlets;

import com.adobe.granite.workflow.WorkflowSession;
import com.adobe.granite.workflow.exec.WorkflowData;
import com.adobe.granite.workflow.model.WorkflowModel;
import org.apache.commons.lang3.StringUtils;
import org.apache.sling.api.SlingHttpServletRequest;
import org.apache.sling.api.SlingHttpServletResponse;
import org.apache.sling.api.resource.ResourceResolver;
import org.apache.sling.api.servlets.SlingSafeMethodsServlet;
import org.apache.sling.servlets.annotations.SlingServletPaths;
import org.apache.sling.servlets.annotations.SlingServletResourceTypes;
import org.osgi.service.component.annotations.Component;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.Servlet;
import javax.servlet.ServletException;
import java.io.IOException;

@Component(service = Servlet.class)
@SlingServletPaths(
        value={"/bin/executeworkflow","/geeksdemo/executeworkflow"}
)

public class ExecuteWorkflow extends SlingSafeMethodsServlet {
    private static final Logger LOG  = LoggerFactory.getLogger(ExecuteWorkflow.class);

    @Override
    protected void doGet(final SlingHttpServletRequest req, SlingHttpServletResponse res) throws ServletException, IOException{
        String status ="Workflow Executing";
        final ResourceResolver resourceResolver = req.getResourceResolver();

        String payload=req.getRequestParameter("page").getString();
        try {
            if (StringUtils.isNotBlank(payload)) {
                WorkflowSession workflowSession = resourceResolver.adaptTo(WorkflowSession.class);

                WorkflowModel workflowModel = workflowSession.getModel("/var/workflow/models/practice-creation-version-");
                WorkflowData workflowData = workflowSession.newWorkflowData("JCR_PATH", payload);
                workflowSession.startWorkflow(workflowModel, workflowData);
            }
        } catch(Exception e){
                LOG.info("/n Error in Workflow{}", e.getMessage());
            }
        }



}


Steps Tried 
1. Added /geeksdemo/ in the execution path of Apache Sling servlet/ Script Resolver and Error Handler
2. Added  -/content/geeksdemo/um in Apache Sling Authentication Service

Please share your suggestion

Thanks,
Punitha