diff --git a/back_end/src/main/java/hackathon/FrisbYEE/jpa/dto/SessionDTO.java b/back_end/src/main/java/hackathon/FrisbYEE/jpa/dto/SessionDTO.java
index 2e44668..3993af5 100644
--- a/back_end/src/main/java/hackathon/FrisbYEE/jpa/dto/SessionDTO.java
+++ b/back_end/src/main/java/hackathon/FrisbYEE/jpa/dto/SessionDTO.java
@@ -7,7 +7,7 @@ import java.util.List;
 
 @Data
 public class SessionDTO {
-
+    private Integer id;
     private String name;
     private Boolean isRecurrent;
     private LocalDateTime creneau;
diff --git a/back_end/src/main/java/hackathon/FrisbYEE/rest/ActiviteResource.java b/back_end/src/main/java/hackathon/FrisbYEE/rest/ActiviteResource.java
index 27bf285..2698ff9 100644
--- a/back_end/src/main/java/hackathon/FrisbYEE/rest/ActiviteResource.java
+++ b/back_end/src/main/java/hackathon/FrisbYEE/rest/ActiviteResource.java
@@ -46,7 +46,7 @@ public class ActiviteResource {
     })
     @PostMapping("/create")
     @ResponseBody
-    @PreAuthorize("hasRole('Coach')")
+    @PreAuthorize("hasRole('coach')")
     public ResponseEntity<String> create(@RequestBody ActiviteDTO dto) {
 
         try {
@@ -69,7 +69,7 @@ public class ActiviteResource {
     })
     @DeleteMapping("/delete/{id}")
     @ResponseBody
-    @PreAuthorize("hasRole('Coach')")
+    @PreAuthorize("hasRole('coach')")
     public ResponseEntity<String> delete(@PathVariable("id") int id) {
         try {
             Activite activite = activiteDAO.findById(id).get();
@@ -89,7 +89,7 @@ public class ActiviteResource {
     })
     @PostMapping("/update/{id}")
     @ResponseBody
-    @PreAuthorize("hasRole('Coach')")
+    @PreAuthorize("hasRole('coach')")
     public ResponseEntity<String> modifyById(@PathVariable("id") int id, @RequestBody ActiviteDTO dto) {
         try {
             Session session = sessionDAO.findById(dto.getSessionId()).get();
@@ -114,7 +114,7 @@ public class ActiviteResource {
             schema = @Schema(implementation = ActiviteDTO.class)))
     })
     @GetMapping("/{id}")
-    @PreAuthorize("hasRole('Coach') or hasRole('Athlete')")
+    @PreAuthorize("hasRole('coach') or hasRole('athlete')")
     @ResponseBody
     public ResponseEntity<ActiviteDTO> getActivityById(@PathVariable("id") int id) {
         try {
@@ -133,7 +133,7 @@ public class ActiviteResource {
             schema = @Schema(implementation = ActiviteDTO.class)))
     })
     @GetMapping("/all")
-    @PreAuthorize("hasRole('Coach') or hasRole('Athlete')")
+    @PreAuthorize("hasRole('coach') or hasRole('athlete')")
     @ResponseBody
     public ResponseEntity<List<ActiviteDTO>> getAllActivity() {
         try {
@@ -153,7 +153,7 @@ public class ActiviteResource {
             schema = @Schema(implementation = ActiviteDTO.class)))
     })
     @GetMapping("/theme/{theme}")
-    @PreAuthorize("hasRole('Coach') or hasRole('Athlete')")
+    @PreAuthorize("hasRole('coach') or hasRole('athlete')")
     @ResponseBody
     public ResponseEntity<List<ActiviteDTO>> getActivityByTheme(@PathVariable("theme") String theme) {
         try {
diff --git a/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java b/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java
index 56c46d3..cc9112e 100644
--- a/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java
+++ b/back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java
@@ -10,6 +10,7 @@ import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.CrossOrigin;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -18,6 +19,8 @@ import org.springframework.web.bind.annotation.PutMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
 import hackathon.FrisbYEE.jpa.dto.ActiviteDTO;
 import hackathon.FrisbYEE.jpa.dto.AthleteDTO;
 import hackathon.FrisbYEE.jpa.dto.SessionDTO;
@@ -45,7 +48,7 @@ public class AthleteResource {
             @ApiResponse(responseCode = "200", description = "Renvoie l'athlète créé", content = @Content(mediaType = "application/json", schema = @Schema(implementation = AthleteDTO.class)))
     })
     @PostMapping("/create")
-    @PreAuthorize("hasRole('Admin') or hasRole('Coach') or hasRole('Athlete')")
+    @PreAuthorize("hasRole('admin') or hasRole('coach') or hasRole('Athlete')")
     public ResponseEntity<AthleteDTO> create(@RequestBody AthleteDTO dto) {
         Athlete athlete = mapToEntity(dto);
         athleteDAO.save(athlete);
@@ -57,7 +60,7 @@ public class AthleteResource {
             @ApiResponse(responseCode = "200", description = "Récupère tous les athlètes", content = @Content(mediaType = "application/json", schema = @Schema(implementation = List.class)))
     })
     @GetMapping("/all")
-    @PreAuthorize("hasRole('Admin') or hasRole('Coach') or hasRole('Athlete')")
+    @PreAuthorize("hasRole('admin') or hasRole('coach') or hasRole('athlete')")
     public ResponseEntity<List<AthleteDTO>> all() {
         List<Athlete> athletes = athleteDAO.findAll();
         List<AthleteDTO> dtos = new ArrayList<>();
@@ -72,7 +75,7 @@ public class AthleteResource {
             @ApiResponse(responseCode = "200", description = "Récupération effectuée", content = @Content(mediaType = "application/json", schema = @Schema(implementation = AthleteDTO.class)))
     })
     @GetMapping("/{id}")
-    @PreAuthorize("hasRole('Admin') or hasRole('Coach') or hasRole('Athlete')")
+    @PreAuthorize("hasRole('admin') or hasRole('coach') or hasRole('athlete')")
     public ResponseEntity<AthleteDTO> getById(@PathVariable Integer id) {
         return athleteDAO.findById(id)
                 .map(athlete -> ResponseEntity.ok(mapToDTO(athlete)))
@@ -84,7 +87,7 @@ public class AthleteResource {
             @ApiResponse(responseCode = "200", description = "Mise à jour effectuée", content = @Content(mediaType = "application/json", schema = @Schema(implementation = AthleteDTO.class)))
     })
     @PutMapping("/{id}")
-    @PreAuthorize("hasRole('ADMIN') or #id == principal.id")
+    @PreAuthorize("hasRole('admin') or #id == principal.id")
     public ResponseEntity<AthleteDTO> update(@PathVariable Integer id, @RequestBody AthleteDTO dto) {
         try {
             Athlete athlete = athleteDAO.findById(id).get();
@@ -115,7 +118,7 @@ public class AthleteResource {
             @ApiResponse(responseCode = "200", description = "Suppression effectuée", content = @Content(mediaType = "application/json", schema = @Schema(implementation = AthleteDTO.class)))
     })
     @DeleteMapping("/{id}")
-    @PreAuthorize("hasRole('Admin')")
+    @PreAuthorize("hasRole('admin')")
     public ResponseEntity<Void> delete(@PathVariable Integer id) {
         if (!athleteDAO.existsById(id)) {
             return ResponseEntity.notFound().build();
@@ -141,7 +144,7 @@ public class AthleteResource {
         athlete.setKeycloakId(dto.getId_keycloak());
         athlete.setCategorie(dto.getCategorie());
         athlete.setNiveau(dto.getNiveau());
-        athlete.setRole(hackathon.FrisbYEE.jpa.metier.Role.ATHLETE);
+        athlete.setRole(hackathon.FrisbYEE.jpa.metier.Role.athlete);
         return athlete;
     }
 
diff --git a/back_end/src/main/java/hackathon/FrisbYEE/rest/SessionResource.java b/back_end/src/main/java/hackathon/FrisbYEE/rest/SessionResource.java
index b620d73..8269ec5 100644
--- a/back_end/src/main/java/hackathon/FrisbYEE/rest/SessionResource.java
+++ b/back_end/src/main/java/hackathon/FrisbYEE/rest/SessionResource.java
@@ -40,7 +40,7 @@ public class SessionResource {
 
     @PostMapping("/create")
     @ResponseBody
-    @PreAuthorize("hasRole('Coach')")
+    @PreAuthorize("hasRole('coach')")
     public ResponseEntity<?> create(@RequestBody SessionDTO dto) {
         try {
             Session session = maptoEntity(dto);
@@ -53,7 +53,7 @@ public class SessionResource {
     }
 
     @GetMapping("/all")
-    @PreAuthorize("hasRole('Coach') or hasRole('Athlete')")
+    @PreAuthorize("hasRole('coach') or hasRole('athlete')")
     public ResponseEntity<List<SessionDTO>> getAll() {
         List<Session> sessions = sessionDAO.findAll();
         List<SessionDTO> dtos = new ArrayList<>();
@@ -64,7 +64,7 @@ public class SessionResource {
     }
 
     @GetMapping("/{id}")
-    @PreAuthorize("hasRole('Coach') or hasRole('Athlete')")
+    @PreAuthorize("hasRole('coach') or hasRole('athlete')")
     public ResponseEntity<?> getById(@PathVariable Integer id) {
         try {
             Session session = sessionDAO.findById(id).orElseThrow();
@@ -76,7 +76,7 @@ public class SessionResource {
 
     @DeleteMapping("/delete/{id}")
     @ResponseBody
-    @PreAuthorize("hasRole('Coach')")
+    @PreAuthorize("hasRole('coach')")
     public ResponseEntity<String> delete(@PathVariable("id") int id) {
         try {
             Session session = sessionDAO.findById(id).get();
@@ -88,7 +88,7 @@ public class SessionResource {
     }
 
     @PutMapping("/update/{id}")
-    @PreAuthorize("hasRole('Coach')")
+    @PreAuthorize("hasRole('coach')")
     public ResponseEntity<Void> updateSession(@PathVariable Integer id, @RequestBody SessionDTO dto) {
         Session session = sessionDAO.findById(id).orElseThrow(() -> new ResponseStatusException(
                 HttpStatus.NOT_FOUND, "Session not found with id " + id));
diff --git a/front_end/src/classes.tsx b/front_end/src/classes.tsx
index 9639d09..cbea7ec 100644
--- a/front_end/src/classes.tsx
+++ b/front_end/src/classes.tsx
@@ -1,5 +1,5 @@
 export type Groupe = "Entrainement" | "Competition" | "Loisir"| "";
-export type Role = "Admin" | "Athlete" | "Coach";
+export type Role = "admin" | "athlete" | "coach";
 
 export class User{
     id!: number;
@@ -98,7 +98,7 @@ export function getUserTest():User{
 
     user.id = 0;
     user.nom = "Emilien-Yee NootNoot";
-    user.role = "Coach"
+    user.role = "coach"
     s1.creneau = new Date();
     s1.id = 1;
     s1.name = "Entrainement Frisbee"
@@ -185,9 +185,9 @@ export function getUserTest():User{
     user.sessions.push(s2);
     user.sessions.push(s3);
 
-    athlete1.role = "Athlete";
-    athlete2.role = "Athlete";
-    athlete3.role = "Athlete";
+    athlete1.role = "athlete";
+    athlete2.role = "athlete";
+    athlete3.role = "athlete";
 
     return user;
 }
diff --git a/front_end/src/components/login.tsx b/front_end/src/components/login.tsx
index 0abca28..a917c32 100644
--- a/front_end/src/components/login.tsx
+++ b/front_end/src/components/login.tsx
@@ -51,7 +51,7 @@ export const Login =() =>{
                 email: tokenParsed?.email,
                 nom: tokenParsed?.family_name,
                 prenom: tokenParsed?.given_name,
-                role: "Athlete",
+                role: "athlete",
                 sessions: []
             });
         }