Hi Jhon,
To change the brand logo navigate to Site Admin > Appearance > Themes > Edwiser RemUI > General settings > Choose site logo format. Once you set the format as per your preference you will be provided with a setting to add a logo image or the site icon according to the format chosen. This logo will be displayed sitewide on the header.
To set the logo for your login page navigate to the live customizer > Login > Panel > Logo. The image added here will be displayed only on the login page.
Thank you