The ornamental design for an accessoryplatform, as shown and described.
FIG. 1 is a perspective view of an accessory platform showing my new ornamental design;
FIG. 2 is a front view of the platform shown in FIG. 1;
FIG. 3 is a rear view of the platform shown in FIG. 1;
FIG. 4 is a right side view of the platform shown in FIG. 1;
FIG. 5 is a left side view of the platform shown in FIG. 1;
FIG. 6 is a top view of the platform shown in FIG. 1;
FIG. 7 is a bottom view of the platform shown in FIG. 1; and,
FIG. 8 is a perspective view of the platform attached between a vest and a bag shown in broken lines, the vest and bag are to show environment and are not part of the claimed design.
The broken lines showing on the accessory flatform are understood to represent stitching, and are not part of the claimed design.