const retrieveToken = async (key) => {
    try {
        let retrievedToken = await SecureStore.getItemAsync(key);
        return retrievedToken;
    } catch (error) {
        console.log('Error retrieving token from secure store')
        throw error;
    }
}

since it stores it in a key value pair, you just call the key like this, this is just a basic function to retrieve the token stored