Fixed spelling mistake on readme.

README.md

@@ -27,7 +27,7 @@ Before using `boto3`, you need to configure your AWS credentials. This can be do
 In your local CLI, run the following command:
 
 ```bash
-openstack --os-cloud=engines creadential list
+openstack --os-cloud=engines credential list
 ```
 
 You should see a table with 5 columns. Under the column `Data`, there should be a JSON with `access`, `secret`, and `trust_id` 
@@ -36,7 +36,7 @@ Replace `<YOUR_ACCESS_KEY_ID>` with the key after `access` and `<YOUR_SECRET_ACC
 
 If you don't have any keys, you can create one by doing:
 ```bash
-openstack --os-cloud=engines ec2 creadential create
+openstack --os-cloud=engines ec2 credential create
 ```
 
 ### Connecting to S3 and Performing Operations