Problem with connecting to org using curl (Trailhead - Apex Web Services module)
I tried following the instructions given in the module (https://trailhead.salesforce.com/content/learn/modules/apex_integration_services/apex_integration_webservices). The code for connecting to the org using curl is as follows: 

curl -v https://login.salesforce.com/services/oauth2/token -d "grant_type=password" -d "client_id=<your_consumer_key>" -d "client_secret=<your_consumer_secret>" -d "username=<your_username>" -d "password=<your_password_and_security_token>" -H 'X-PrettyPrint:1'

I supplied all the credentials needed in the curl command but I keep getting this error whenever I execute the command: 

{"error":"invalid_grant","error_description":"authentication failure"}* Connection #0 to host test.salesforce.com left intact

help me plz......

(New org, Superbadge: App Customization Specialist, Step 4)
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