Qualitative graph for a Cauchy problem's solution.

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I guys. I have to draw the qualitative graph of this Cauchy problem:

$$\begin{cases} y'(x)=-\frac{y(x)}{1+e^{y(x)}} \\ y(0)=1\\ \end{cases}$$ What road should I have to follow to don't go in troubles? Thank you.