As a user, I want to be able to search for an existing user based on their name and date of birth so I can find their profile.

[rosalie-baxter]

• [ ] I should be able to type in the client’s first name, surname, and date of birth.
• [ ] First name and surname are compulsory, date of birth is optional
• [ ] I should be able to click on the ‘search’ button and be taken to a page which displays the results of my search
• [ ] I should be able to click on the ‘register a new client’ button and be taken to the page which registers a new client

[rosalie-baxter]

NB: look into how difficult it is to search for multiple fields: if it's too hard then just search for DOB