Fixed role typo in athelete creation

back_end/src/main/java/hackathon/FrisbYEE/rest/AthleteResource.java

@@ -48,7 +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);