Studio theme - need a client log in button in header

[HelsKnitKitCo]

Hi there

I am helping a friend with their website, they are using the studio theme. They have a CRM system which they use which they want their clients to be able to log into from the website. I have managed to create a button for this in the body of the website (this button basically is a link to an external log-in page which is what we need) but my pal is quite keen for this log in button to be in the header. I cannot work out how to do this - the only button I can put in the header is the shopify login one (which is basically people who are/have been customers - this is not what we need).

Any help would be much appreciated!

Thank you

H

[KetanKumar]

@HelsKnitKitCo 

Sorry you are facing this issue, it would be my pleasure to help you.

Welcome to the Shopify community!😊
Thanks for your good question.

Please share your site URL,
I will check out the issue and provide you a solution here.

also can you please enable log in option  
https://help.shopify.com/en/manual/customers/customer-accounts