In order to use different Steem apps, you may be required to enter your "Posting Key".
Here is how to easily find the your Posting Key:
First go to your wallet:
Next click on the following:
- Click the "Wallet" tab if it is not already selected
- Click the "Permissions" tab
- Click on the "Show Private Key", to display your Steem Posting Private Key (the key current shown is the public key).