Wrap code into if supported check

src/auth/AuthProvider.tsx

@@ -105,9 +105,7 @@ class AuthProvider extends React.Component<
     if (!!token && !user) {
       this.verifyToken(token);
     } else {
-      if (isCredentialsManagementAPISupported) {
-        loginWithCredentialsManagementAPI(this.login);
-      }
+      loginWithCredentialsManagementAPI(this.login);
     }
   }
 
@@ -117,9 +115,7 @@ class AuthProvider extends React.Component<
 
     tokenAuthFn({ variables: { email, password } }).then(result => {
       if (result && !result.data.tokenCreate.errors.length) {
-        if (isCredentialsManagementAPISupported) {
-          saveCredentials(result.data.tokenCreate.user, password);
-        }
+        saveCredentials(result.data.tokenCreate.user, password);
       }
     });
   };

src/utils/credentialsManagement.ts

@@ -4,19 +4,23 @@ export const isSupported =
   navigator.credentials && navigator.credentials.preventSilentAccess;
 
 export function login(loginFn: (id: string, password: string) => void) {
-  navigator.credentials.get({ password: true }).then(credential => {
-    if (credential instanceof PasswordCredential) {
-      loginFn(credential.id, credential.password);
-    }
-  });
+  if (isSupported) {
+    navigator.credentials.get({ password: true }).then(credential => {
+      if (credential instanceof PasswordCredential) {
+        loginFn(credential.id, credential.password);
+      }
+    });
+  }
 }
 
 export function saveCredentials(user: User, password: string) {
-  const cred = new PasswordCredential({
-    iconURL: user.avatar ? user.avatar.url : undefined,
-    id: user.email,
-    name: user.firstName ? `${user.firstName} ${user.lastName}` : undefined,
-    password
-  });
-  navigator.credentials.store(cred);
+  if (isSupported) {
+    const cred = new PasswordCredential({
+      iconURL: user.avatar ? user.avatar.url : undefined,
+      id: user.email,
+      name: user.firstName ? `${user.firstName} ${user.lastName}` : undefined,
+      password
+    });
+    navigator.credentials.store(cred);
+  }
 }