gain access to (someone or something)

To acquire the means, ability, or permission to contact or make use of someone or something. The detective gained access to the suspects' email accounts, which she hoped would contain proof of their involvement in the crime. The reporter is hoping to gain access to the senators for an interview about the new tax legislation they are helping to create. There's no sign of forced entry. It's like the thieves gained access to the apartment with a key or something.