minor fix

frontend/src/components/login/login.js

@@ -126,6 +126,7 @@ export default function Login() {
                                             id="usernameInput"
                                             label="Username"
                                             variant="outlined"
+                                            value={username}
                                             onChange={handleChangeUSR}
                                             className={classes.input}
                                         />
@@ -139,6 +140,7 @@ export default function Login() {
                                             label="Password"
                                             autoComplete="current-password"
                                             variant="outlined"
+                                            value={password}
                                             onChange={handleChangePW}
                                             className={classes.input}
                                         />