Like @enlightened_06 said, if navigation elements are hidden behind a hamburger menu, many users won't bother to spend the time looking for them. The growing trend is to use a bottom navigation bar that puts the most needed pages/actions front and center. Google has even added it to their Material design guidelines.
However, just because you add bottom navigation, doesn't mean you need to remove existing navigational elements. Take these examples from Luke Wroblewski at Google:
Notice that even though bottom navigation was added, each app still has top navigation, which still includes a hamburger menu among other things.
Exactly what navigation elements you include and where you put them is going to depend on the needs and goals of your users. I'd suggest looking at other apps that have added bottom navigation to get ideas for different possible solutions. Google has been adding it to all of their apps. Facebook added it a while ago. Spotify just added it. I'm sure there are many others.