diff --git a/Controllers/AppUsersController.cs b/Controllers/AppUsersController.cs
index 2c1b759..63bedb2 100644
--- a/Controllers/AppUsersController.cs
+++ b/Controllers/AppUsersController.cs
@@ -64,7 +64,7 @@ namespace TicketManager.Controllers
         [HttpGet("{id}")]
         [ProducesResponseType(StatusCodes.Status200OK)]
         [ProducesResponseType(StatusCodes.Status404NotFound)]
-        public async Task<ActionResult<AppUserDTO>> GetUser(Guid id)
+        public async Task<ActionResult<AppUserDTO>> GetUser(string id)
         {
             var user = await _context.AppUsers
                 .Include(u => u.Assignments)
@@ -103,7 +103,7 @@ namespace TicketManager.Controllers
         [HttpPut("{id}")]
         [ProducesResponseType(StatusCodes.Status204NoContent)]
         [ProducesResponseType(StatusCodes.Status404NotFound)]
-        public async Task<IActionResult> PutUser(Guid id, AppUser user)
+        public async Task<IActionResult> PutUser(string id, AppUser user)
         {
             if (id != user.Id)
             {
@@ -202,7 +202,7 @@ namespace TicketManager.Controllers
         }
 
         [HttpGet("{id}/projects")]
-        public async Task<ActionResult<IEnumerable<ProjectDTORequest>>> GetAppUserProjects(Guid id)
+        public async Task<ActionResult<IEnumerable<ProjectDTORequest>>> GetAppUserProjects(string id)
         {
             var user = await _context.AppUsers
                 .Include(u => u.Assignments)
@@ -218,7 +218,7 @@ namespace TicketManager.Controllers
         }
 
         [HttpGet("{id}/tickets/")]
-        public async Task<ActionResult<IEnumerable<TicketDTORead>>> GetAppUserTickets(Guid id)
+        public async Task<ActionResult<IEnumerable<TicketDTORead>>> GetAppUserTickets(string id)
         {
             var user = await _context.AppUsers
                 .Include(u => u.Assignments)
@@ -233,7 +233,7 @@ namespace TicketManager.Controllers
             return user.GetTickets().Select(t => new TicketDTORead(t)).ToList();
         }
 
-        private bool UserExists(Guid id)
+        private bool UserExists(string id)
         {
             return _context.AppUsers.Any(e => e.Id == id);
         }
diff --git a/Controllers/ProjectsController.cs b/Controllers/ProjectsController.cs
index c06bfb0..43800b1 100644
--- a/Controllers/ProjectsController.cs
+++ b/Controllers/ProjectsController.cs
@@ -271,7 +271,7 @@ namespace TicketManager.Controllers
         [HttpPatch("{id}/members")]
         public async Task<ActionResult<Project>> SetProjectMembers(
             [FromRoute] int id,
-            [FromBody] Guid[] membersId)
+            [FromBody] string[] membersId)
         {
             Project project = await _context.Projects
                 .Include(p => p.Assignments)
diff --git a/Models/AppUser.cs b/Models/AppUser.cs
index 43e0924..f0f5b93 100644
--- a/Models/AppUser.cs
+++ b/Models/AppUser.cs
@@ -8,7 +8,7 @@ namespace TicketManager.Models
 {
     public class AppUser
     {
-        public Guid Id { get; set; }
+        public string Id { get; set; }
 
         [Required]
         [StringLength(50)]
diff --git a/Models/Assignment.cs b/Models/Assignment.cs
index d31396e..8be0d17 100644
--- a/Models/Assignment.cs
+++ b/Models/Assignment.cs
@@ -5,7 +5,7 @@ namespace TicketManager.Models
     public class Assignment
     {
         public AppUser User { get; set; }
-        public Guid UserId { get; set; }
+        public string UserId { get; set; }
         public Project Project { get; set; }
         public int ProjectId { get; set; }
     }
diff --git a/Resources/AppUser/AppUserDTO.cs b/Resources/AppUser/AppUserDTO.cs
index c942884..49c4144 100644
--- a/Resources/AppUser/AppUserDTO.cs
+++ b/Resources/AppUser/AppUserDTO.cs
@@ -23,7 +23,7 @@ namespace TicketManager.Resources
             Tickets = user.GetTickets().Select(u => new TicketDTORead(u)).ToList();
         }
 
-        public Guid Id { get; set; }
+        public string Id { get; set; }
 
         public string FirstName { get; set; }
 
diff --git a/Resources/AppUser/AppUserDTORead.cs b/Resources/AppUser/AppUserDTORead.cs
index 494476a..70fb3a0 100644
--- a/Resources/AppUser/AppUserDTORead.cs
+++ b/Resources/AppUser/AppUserDTORead.cs
@@ -20,7 +20,7 @@ namespace TicketManager.Resources
             Picture = user.Picture;
         }
 
-        public Guid Id { get; set; }
+        public string Id { get; set; }
 
         public string FirstName { get; set; }
 
diff --git a/Resources/AppUser/NewAppUserDTO.cs b/Resources/AppUser/NewAppUserDTO.cs
index 1b146e7..9110195 100644
--- a/Resources/AppUser/NewAppUserDTO.cs
+++ b/Resources/AppUser/NewAppUserDTO.cs
@@ -4,6 +4,8 @@ namespace TicketManager.Resources
 {
     public class NewAppUserDTO
     {
+        public string Id { get; set; }
+
         [Required]
         public string FirstName { get; set; }
         public string LastName { get; set; }
diff --git a/client/src/authentication/helpers.ts b/client/src/authentication/helpers.ts
new file mode 100644
index 0000000..3a8a915
--- /dev/null
+++ b/client/src/authentication/helpers.ts
@@ -0,0 +1,9 @@
+/**
+ * retrieve userId
+ * @param user Auth0 user object
+ */
+export const getUID = (user: any) => {
+  const { sub } = user;
+  const uid = sub.split("|")[1];
+  return uid;
+};
diff --git a/client/src/components/Modals/NewProjectModal.tsx b/client/src/components/Modals/NewProjectModal.tsx
index 1c1694c..6477a7f 100644
--- a/client/src/components/Modals/NewProjectModal.tsx
+++ b/client/src/components/Modals/NewProjectModal.tsx
@@ -3,6 +3,7 @@ import { TextField } from "@material-ui/core";
 import { useAuth0 } from "../../authentication/auth0";
 import { ProjectService } from "../../services";
 import Modal from "./Modal";
+import { getUID } from "../../authentication/helpers";
 
 interface IProps {
   show: boolean;
@@ -21,7 +22,7 @@ const NewProjectModal: FC<IProps> = ({ show, handleClose }) => {
       title: title,
       description: description,
       endingDate: new Date(endingDate).toISOString(),
-      managerId: "cd179eb7-3a54-4060-b22c-3e947bdffcbc", // get current User id
+      managerId: getUID(user), // get current User id
     };
 
     const token = await getTokenSilently();
diff --git a/client/src/pages/HomePage.tsx b/client/src/pages/HomePage.tsx
index 15c753c..57f3804 100644
--- a/client/src/pages/HomePage.tsx
+++ b/client/src/pages/HomePage.tsx
@@ -1,8 +1,4 @@
 import React, { FC } from "react";
-// import { LogInForm } from "../components/LogInForm";
-// import { ProfileSelector } from "../components/ProfileSelector";
-import SignInSide from "../components/SignInSide";
-import { useAuth0 } from "../authentication/auth0";
 
 const HomePage: FC = () => {
   return <div>HomePage</div>;
diff --git a/client/src/pages/SigninPage.tsx b/client/src/pages/SigninPage.tsx
index c6215b8..59241d2 100644
--- a/client/src/pages/SigninPage.tsx
+++ b/client/src/pages/SigninPage.tsx
@@ -1,7 +1,8 @@
 import React, { FC } from "react";
+import { Redirect } from "react-router-dom";
 import SignInSide from "../components/SignInSide";
 import { useAuth0 } from "../authentication/auth0";
-import { Redirect } from "react-router-dom";
+import { getUID } from "../authentication/helpers";
 import * as ROUTES from "../constants/routes";
 
 const SigninPage: FC = () => {
@@ -9,8 +10,7 @@ const SigninPage: FC = () => {
 
   if (isAuthenticated) {
     // retrieve userId
-    const { sub } = user;
-    const uid = sub.split("|")[1];
+    const uid = getUID(user);
     return <Redirect to={`${ROUTES.USERS}/${uid}`} />;
   } else {
     return <SignInSide />;