Differential Equations: JEE Main 2021 Mathematics question

Let y = y(x) be solution of the following differential equation ${e^y}{{dy} \over {dx}} - 2{e^y}\sin x + \sin x{\cos ^2}x = 0,y\left( {{\pi \over 2}} \right) = 0$ If $y(0) = {\log _e}(\alpha + \beta {e^{ - 2}})$, then $4(\alpha + \beta )$ is equal to ______________.