If the length of the tangent from $(1,1)$ to the circle $2x^{2}+2y^{2}-4x-6y+k=0$ is $5$ units then $k-1=$
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If the length of the tangent from $(1,1)$ to the circle $2x^{2}+2y^{2}-4x-6y+k=0$ is $5$ units then $k-1=$