...
Get consumer key and consumer secret by connected app
Go to https://ap2.salesforce.com/ and sign in your Salesforce CRM account above.
If you are in Lightning Experience, please switch it to Salesforce Classic to easily follow our user guide. Please refer to image below:
...
Your Salesforce CRM account will appear as below. Go to https://ap2.salesforce.com/ and sign in your Salesforce CRM account above, then click Click on Setup > Built > Create > Apps. In connected apps section, click New to add a new app.
...